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Differentiating Trig
Differentiating Trig
lim sin x  0
x 0
Differentiating Trig
lim sin x  0
x 0

lim cos x  1
x 0
Differentiating Trig
lim sin x  0
x 0

lim cos x  1
x 0

lim tan x  0
x 0
Differentiating Trig
lim sin x  0           Area Sector OAC
x 0

lim cos x  1
x 0

lim tan x  0
x 0



                C


            x
        O           A
                1
Differentiating Trig
lim sin x  0       Area AOC  Area Sector OAC
x 0

lim cos x  1
x 0

lim tan x  0
x 0



                C

            x       A
        O       1
Differentiating Trig
lim sin x  0
x 0
                        Area AOC  Area Sector OAC  Area AOB
lim cos x  1
x 0

lim tan x  0       B
x 0



                C
                    tan x



            x       A
        O       1
Differentiating Trig
lim sin x  0
x 0
                        Area AOC  Area Sector OAC  Area AOB
                              1               1 2     1
lim cos x  1
x 0
                                11 sin x  1 x  1 tan x
                              2               2       2
lim tan x  0       B
x 0



                C
                    tan x



            x       A
        O       1
Differentiating Trig
lim sin x  0
x 0
                      Area AOC  Area Sector OAC  Area AOB
                            1                1 2       1
lim cos x  1
x 0
                              11 sin x  1 x  1 tan x
                            2                2         2
lim tan x  0       B                      sin x  x  tan x
x 0



                C
                    tan x



            x       A
        O       1
Differentiating Trig
lim sin x  0
x 0
                      Area AOC  Area Sector OAC  Area AOB
                            1                1 2       1
lim cos x  1
x 0
                              11 sin x  1 x  1 tan x
                            2                2         2
lim tan x  0       B                      sin x  x  tan x
x 0
                                         sin x     x     tan x
                                                      
                                         sin x sin x sin x
                C
                    tan x



            x       A
        O       1
Differentiating Trig
lim sin x  0
x 0
                      Area AOC  Area Sector OAC  Area AOB
                            1                1 2       1
lim cos x  1
x 0
                              11 sin x  1 x  1 tan x
                            2                2         2
lim tan x  0       B                      sin x  x  tan x
x 0
                                         sin x     x     tan x
                                                      
                                         sin x sin x sin x
                C
                    tan x
                                                   x       1
                                             1        
                                                 sin x cos x
            x       A
        O       1
Differentiating Trig
lim sin x  0
x 0
                      Area AOC  Area Sector OAC  Area AOB
                            1                1 2        1
lim cos x  1
x 0
                              11 sin x  1 x  1 tan x
                            2                2          2
lim tan x  0       B                      sin x  x  tan x
x 0
                                         sin x      x     tan x
                                                       
                                         sin x sin x sin x
                C
                    tan x
                                                    x       1
                                             1         
                                                 sin x cos x
            x       A                         as x  0
        O       1                                   x
                                              1        1
                                                  sin x
Differentiating Trig
lim sin x  0
x 0
                      Area AOC  Area Sector OAC  Area AOB
                            1                1 2        1
lim cos x  1
x 0
                              11 sin x  1 x  1 tan x
                            2                2          2
lim tan x  0       B                      sin x  x  tan x
x 0
                                         sin x      x     tan x
                                                       
                                         sin x sin x sin x
                C
                    tan x
                                                    x       1
                                             1         
                                                 sin x cos x
            x       A                         as x  0
        O       1                                   x
                                              1        1
                                                  sin x
                                               x
                                        lim        1
                                        x 0 sin x
5x
e.g. i  lim
         x 0 sin 5 x
5x
e.g. i  lim         1
         x 0 sin 5 x
5x
e.g. i  lim         1   ii  lim
                                         x
         x 0 sin 5 x            x 0 sin 3 x
5x
e.g. i  lim         1   ii  lim
                                         x
                                               lim 
                                                     1 3x
         x 0 sin 5 x            x 0 sin 3 x   x 0 3 sin 3 x
5x
e.g. i  lim         1   ii  lim
                                         x
                                               lim 
                                                     1 3x
         x 0 sin 5 x            x 0 sin 3 x   x 0 3 sin 3 x

                                                1
                                              
                                                3
5x
 e.g. i  lim        1   ii  lim
                                         x
                                               lim 
                                                     1 3x
         x 0 sin 5 x            x 0 sin 3 x   x 0 3 sin 3 x

y  sin x                                       1
                                              
                                                3
5x
 e.g. i  lim        1            ii  lim
                                                  x
                                                        lim 
                                                              1 3x
         x 0 sin 5 x                     x 0 sin 3 x   x 0 3 sin 3 x

y  sin x                                                1
                                                       
     dy       sin  x  h   sin x                      3
         lim
     dx x 0            h
5x
 e.g. i  lim        1              ii  lim
                                                    x
                                                          lim 
                                                                1 3x
         x 0 sin 5 x                       x 0 sin 3 x   x 0 3 sin 3 x

y  sin x                                                  1
                                                         
     dy         sin  x  h   sin x                      3
         lim
     dx x 0              h
                sin x cosh  cos x sinh  sin x
         lim
           x 0                   h
5x
 e.g. i  lim        1                ii  lim
                                                      x
                                                            lim 
                                                                  1 3x
         x 0 sin 5 x                         x 0 sin 3 x   x 0 3 sin 3 x

y  sin x                                                    1
                                                           
     dy         sin  x  h   sin x                        3
         lim
     dx x 0               h
                sin x cosh  cos x sinh  sin x
         lim
           x 0                   h
                                           cosh  1 
         lim cos x
                          sinh 
                                sin x            
           x 0          h              h 
5x
 e.g. i  lim        1                ii  lim
                                                      x
                                                             lim 
                                                                   1 3x
         x 0 sin 5 x                         x 0 sin 3 x    x 0 3 sin 3 x

y  sin x                                                     1
                                                            
     dy         sin  x  h   sin x                         3
         lim
     dx x 0               h
                 sin x cosh  cos x sinh  sin x
         lim
           x 0                   h
                                           cosh  1 
         lim cos x
                          sinh 
                                sin x            
           x 0          h              h 
                                                    h     
                                           2 cos 2  2 
                          sinh                    2
          lim cos x            sin x                   
             x 0         h             
                                          
                                                   h       
                                                           
                                                          
5x
 e.g. i  lim        1                ii  lim
                                                      x
                                                             lim 
                                                                   1 3x
         x 0 sin 5 x                         x 0 sin 3 x    x 0 3 sin 3 x

y  sin x                                                     1
                                                            
     dy         sin  x  h   sin x                         3
         lim
     dx x 0               h
                 sin x cosh  cos x sinh  sin x
         lim
           x 0                   h
                                           cosh  1 
         lim cos x
                          sinh 
                                sin x            
           x 0          h              h 
                                                    h     
                                           2 cos 2  2 
                          sinh                    2      cos 2  2 cos 2   1
          lim cos x            sin x
             x 0         h             
                                          
                                                   h       
                                                           
                                                          
5x
 e.g. i  lim        1                ii  lim
                                                      x
                                                             lim 
                                                                   1 3x
         x 0 sin 5 x                         x 0 sin 3 x    x 0 3 sin 3 x

y  sin x                                                     1
                                                            
     dy         sin  x  h   sin x                         3
         lim
     dx x 0               h
                 sin x cosh  cos x sinh  sin x
         lim
           x 0                   h
                                           cosh  1 
         lim cos x
                          sinh 
                                sin x            
           x 0          h              h 
                                                    h     
                                           2 cos 2  2 
                          sinh                    2      cos 2  2 cos 2   1
          lim cos x            sin x
             x 0         h             
                                          
                                                   h       
                                                           
                                                          
                                                  2 h
                          sinh          2 sin 
          lim cos x            sin x             2
             x 0         h              h 
                                                      
                                                      
 2 h
                            sin 
 lim cos x
             sinh 
                   sin x h 2 
  x 0      h            
                                
                                 
                            2 
 2 h
                            sin 
 lim cos x
             sinh 
                   sin x h 2 
   x 0     h            
                                  
                                   
                            2 
                                h    
            sinh         sin
                                     h
 lim cos x       sin x h 2  sin 
  x 0      h            
                           
                                     2
                                      
                            2        
 2 h
                              sin 
 lim cos x
              sinh 
                     sin x h 2 
   x 0      h             
                                    
                                     
                              2 
                                  h    
             sinh          sin
                                       h
 lim cos x         sin x h 2  sin 
  x 0       h             
                             
                                       2
                                        
                              2        
 cos x 1  sin x 0 
 2 h
                              sin 
 lim cos x
              sinh 
                     sin x h 2 
   x 0      h             
                                    
                                     
                              2 
                                  h    
             sinh          sin
                                       h
 lim cos x         sin x h 2  sin 
  x 0       h             
                             
                                       2
                                        
                              2        
 cos x 1  sin x 0 
 cos x
 2 h
             sinh           sin 
                                     2
 lim cos x          sin x h 
   x 0      h             
                                      
                                       
                              2 
                                  h      
             sinh           sin
                                         h
                                   2
 lim cos x          sin x h  sin 
  x 0       h             
                             
                                         2
                                          
                              2             y  sin f  x 
 cos x 1  sin x 0 
 cos x
 2 h
                              sin 
 lim cos x
              sinh                  2
                     sin x h 
   x 0      h             
                                      
                                       
                              2 
                                  h      
                                        h
                               sin
             sinh               2
 lim cos x         sin x h  sin 
  x 0       h             
                             
                                         2
                                          
                              2              y  sin f  x 
 cos x 1  sin x 0                   dy
                                                  f  x  cos f  x 
                                              dx
 cos x
 2 h
                                sin 
   lim cos x
                sinh                  2
                       sin x h 
     x 0      h             
                                        
                                         
                                2 
                                    h      
                                          h
                                 sin
               sinh               2
   lim cos x         sin x h  sin 
    x 0       h             
                               
                                           2
                                            
                                2              y  sin f  x 
   cos x 1  sin x 0                   dy
                                                    f  x  cos f  x 
                                                dx
   cos x
y  cos x
 2 h
                                sin 
   lim cos x
                sinh                  2
                       sin x h 
     x 0      h             
                                        
                                         
                                2 
                                    h      
                                          h
                                 sin
               sinh               2
   lim cos x         sin x h  sin 
    x 0       h             
                               
                                           2
                                            
                                2              y  sin f  x 
   cos x 1  sin x 0                   dy
                                                    f  x  cos f  x 
                                                dx
   cos x
y  cos x
          
y  sin   x 
             
        2    
 2 h
                                 sin 
    lim cos x
                 sinh                  2
                        sin x h 
      x 0      h             
                                         
                                          
                                 2 
                                     h      
                                           h
                                  sin
                sinh               2
    lim cos x         sin x h  sin 
     x 0       h             
                                
                                            2
                                             
                                 2              y  sin f  x 
    cos x 1  sin x 0                   dy
                                                     f  x  cos f  x 
                                                 dx
    cos x
y  cos x
           
 y  sin   x 
                
         2      
               
     cos  x 
dy
                  
dx           2    
 2 h
                                 sin 
    lim cos x
                 sinh                  2
                        sin x h 
      x 0      h             
                                         
                                          
                                 2 
                                     h      
                                           h
                                  sin
                sinh               2
    lim cos x         sin x h  sin 
     x 0       h             
                                
                                            2
                                             
                                 2              y  sin f  x 
    cos x 1  sin x 0                   dy
                                                     f  x  cos f  x 
                                                 dx
    cos x
y  cos x
           
 y  sin   x 
                
         2      
               
     cos  x 
dy
                  
dx           2    
     sin x
 2 h
                                 sin 
    lim cos x
                 sinh                  2
                        sin x h 
      x 0      h             
                                         
                                          
                                 2 
                                     h      
                                           h
                                  sin
                sinh               2
    lim cos x         sin x h  sin 
     x 0       h             
                                
                                            2
                                             
                                 2              y  sin f  x 
    cos x 1  sin x 0                   dy
                                                     f  x  cos f  x 
                                                 dx
    cos x
y  cos x
           
 y  sin   x 
                
         2                                       y  cos f  x 
               
     cos  x 
dy
                  
dx           2    
     sin x
 2 h
                                 sin 
    lim cos x
                 sinh                  2
                        sin x h 
      x 0      h             
                                         
                                          
                                 2 
                                     h      
                                           h
                                  sin
                sinh               2
    lim cos x         sin x h  sin 
     x 0       h             
                                
                                            2
                                             
                                 2              y  sin f  x 
    cos x 1  sin x 0                   dy
                                                     f  x  cos f  x 
                                                 dx
    cos x
y  cos x
           
 y  sin   x 
                
         2                                      y  cos f  x 
               
     cos  x 
                                                 dy
                                                      f  x  sin f  x 
dy
                  
dx           2                                 dx
     sin x
y  tan x
y  tan x
     sin x
y
     cos x
y  tan x
     sin x
 y
     cos x
dy cos x cos x   sin x  sin x 
   
dx                 cos 2 x
     cos 2 x  sin 2 x
   
          cos 2 x
y  tan x
     sin x
 y
     cos x
dy cos x cos x   sin x  sin x 
   
dx                 cos 2 x
     cos 2 x  sin 2 x
   
          cos 2 x
       1
   
     cos 2 x
    sec 2 x
y  tan x
     sin x
 y
     cos x
dy cos x cos x   sin x  sin x 
   
dx                 cos 2 x
     cos 2 x  sin 2 x
   
          cos 2 x
       1
   
     cos 2 x
    sec 2 x

      y  tan f  x 
y  tan x
     sin x
 y
     cos x
dy cos x cos x   sin x  sin x 
   
dx                 cos 2 x
     cos 2 x  sin 2 x
   
          cos 2 x
       1
   
     cos 2 x
    sec 2 x

     y  tan f  x 
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                 e.g. i  y  sin x 3
     sin x
 y
     cos x
dy cos x cos x   sin x  sin x 
   
dx                 cos 2 x
     cos 2 x  sin 2 x
   
          cos 2 x
       1
   
     cos 2 x
    sec 2 x

     y  tan f  x 
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                 e.g. i  y  sin x 3
                                                   dy
     sin x                                              3 x 2 cos x 3
 y                                                dx
     cos x
dy cos x cos x   sin x  sin x 
   
dx                 cos 2 x
     cos 2 x  sin 2 x
   
          cos 2 x
       1
   
     cos 2 x
    sec 2 x

     y  tan f  x 
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                 e.g. i  y  sin x 3
                                                   dy
     sin x                                              3 x 2 cos x 3
 y                                                dx
     cos x
dy cos x cos x   sin x  sin x                        1
                                              ii  y  tan
dx                 cos 2 x                                     x
     cos 2 x  sin 2 x
   
          cos 2 x
       1
   
     cos 2 x
    sec 2 x

     y  tan f  x 
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                 e.g. i  y  sin x 3
                                                   dy
     sin x                                              3 x 2 cos x 3
 y                                                dx
     cos x
dy cos x cos x   sin x  sin x                    1
                                              ii  y  tan
dx                 cos 2 x                                 x
                                                  dy     1       1
     cos 2 x  sin 2 x                                 2 sec 2
                                                 dx    x        x
          cos 2 x
       1
   
     cos 2 x
    sec 2 x

     y  tan f  x 
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                  e.g. i  y  sin x 3
                                                    dy
     sin x                                               3 x 2 cos x 3
 y                                                 dx
     cos x
dy cos x cos x   sin x  sin x                       1
                                               ii  y  tan
dx               cos 2 x                                      x
                                                   dy       1       1
     cos x  sin x
          2      2
                                                          2 sec 2
             2                                    dx       x       x
           cos x
   
       1                     iii  y  log cos x
     cos 2 x
    sec 2 x

     y  tan f  x 
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                  e.g. i  y  sin x 3
                                                    dy
     sin x                                               3 x 2 cos x 3
 y                                                 dx
     cos x
dy cos x cos x   sin x  sin x                       1
                                               ii  y  tan
dx              cos 2 x                                       x
                                                   dy       1       1
     cos x  sin x
         2      2
                                                          2 sec 2
            2                                     dx       x       x
          cos x
   
       1                     iii  y  log cos x
     cos 2 x                      dy  sin x
                                      
    sec x
        2
                                  dx cos x


     y  tan f  x 
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                  e.g. i  y  sin x 3
                                                    dy
     sin x                                               3 x 2 cos x 3
 y                                                 dx
     cos x
dy cos x cos x   sin x  sin x                       1
                                               ii  y  tan
dx              cos 2 x                                       x
                                                   dy       1       1
     cos x  sin x
         2      2
                                                          2 sec 2
            2                                     dx       x       x
          cos x
   
       1                     iii  y  log cos x
     cos 2 x                      dy  sin x
                                      
    sec x
        2
                                  dx cos x
                                        tan x
     y  tan f  x 
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                 e.g. i  y  sin x 3
                                                   dy
     sin x                                              3 x 2 cos x 3
 y                                                dx
     cos x
dy cos x cos x   sin x  sin x                       1
                                               ii  y  tan
dx              cos 2 x                                       x
                                                   dy       1       1
     cos x  sin x
         2      2
                                                          2 sec 2
            2                                     dx       x       x
          cos x
   
       1                     iii  y  log cos x iv  y  tan 5 x
     cos 2 x                      dy  sin x
                                      
    sec x
        2
                                  dx cos x
                                        tan x
     y  tan f  x 
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                  e.g. i  y  sin x 3
                                                    dy
     sin x                                               3 x 2 cos x 3
 y                                                 dx
     cos x
dy cos x cos x   sin x  sin x                       1
                                               ii  y  tan
dx               cos 2 x                                      x
                                                   dy       1       1
     cos x  sin x
          2      2
                                                          2 sec 2
             2                                    dx       x       x
           cos x
   
       1                     iii  y  log cos x iv  y  tan 5 x
     cos 2 x                      dy  sin x               dy
                                                              5 tan 4 x sec 2 x
    sec 2 x                      dx cos x                 dx
                                        tan x
     y  tan f  x 
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                  e.g. i  y  sin x 3
                                                    dy
     sin x                                               3 x 2 cos x 3
 y                                                 dx
     cos x
dy cos x cos x   sin x  sin x                       1
                                               ii  y  tan
dx               cos 2 x                                      x
                                                   dy       1       1
     cos x  sin x
          2      2
                                                          2 sec 2
             2                                    dx       x       x
           cos x
   
       1                     iii  y  log cos x iv  y  tan 5 x
     cos 2 x                      dy  sin x               dy
                                                              5 tan 4 x sec 2 x
    sec 2 x                      dx cos x                 dx
                                        tan x
     y  tan f  x                            v  y  cos e x
    dy
        f  x  sec 2 f  x 
    dx
y  tan x                                  e.g. i  y  sin x 3
                                                    dy
     sin x                                               3 x 2 cos x 3
 y                                                 dx
     cos x
dy cos x cos x   sin x  sin x                       1
                                               ii  y  tan
dx               cos 2 x                                      x
                                                   dy       1       1
     cos x  sin x
          2      2
                                                          2 sec 2
             2                                    dx       x       x
           cos x
   
       1                     iii  y  log cos x iv  y  tan 5 x
     cos 2 x                      dy  sin x               dy
                                                              5 tan 4 x sec 2 x
    sec 2 x                      dx cos x                 dx
                                        tan x
     y  tan f  x                            v  y  cos e x
    dy
        f  x  sec 2 f  x                    dy
    dx                                                e x sin e x
                                                  dx
Exercise 14F; 2, 4, 5

Exercise 14G; 2ace etc, 3ace etc, 5ace etc, 6, 7ab(i), 8, 12, 13c, 16a*

              Exercise 14H; 2 ac, 4bd, 6, 8, 14, 17, 20

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11 x1 t16 05 volumes (2013)
 
11 x1 t16 04 areas (2013)
11 x1 t16 04 areas (2013)11 x1 t16 04 areas (2013)
11 x1 t16 04 areas (2013)
 
11 x1 t16 03 indefinite integral (2013)
11 x1 t16 03 indefinite integral (2013)11 x1 t16 03 indefinite integral (2013)
11 x1 t16 03 indefinite integral (2013)
 
11 x1 t16 02 definite integral (2013)
11 x1 t16 02 definite integral (2013)11 x1 t16 02 definite integral (2013)
11 x1 t16 02 definite integral (2013)
 

12X1 T03 03 differentiating trig (2011)

  • 3. Differentiating Trig lim sin x  0 x 0 lim cos x  1 x 0
  • 4. Differentiating Trig lim sin x  0 x 0 lim cos x  1 x 0 lim tan x  0 x 0
  • 5. Differentiating Trig lim sin x  0 Area Sector OAC x 0 lim cos x  1 x 0 lim tan x  0 x 0 C x O A 1
  • 6. Differentiating Trig lim sin x  0 Area AOC  Area Sector OAC x 0 lim cos x  1 x 0 lim tan x  0 x 0 C x A O 1
  • 7. Differentiating Trig lim sin x  0 x 0 Area AOC  Area Sector OAC  Area AOB lim cos x  1 x 0 lim tan x  0 B x 0 C tan x x A O 1
  • 8. Differentiating Trig lim sin x  0 x 0 Area AOC  Area Sector OAC  Area AOB 1 1 2 1 lim cos x  1 x 0 11 sin x  1 x  1 tan x 2 2 2 lim tan x  0 B x 0 C tan x x A O 1
  • 9. Differentiating Trig lim sin x  0 x 0 Area AOC  Area Sector OAC  Area AOB 1 1 2 1 lim cos x  1 x 0 11 sin x  1 x  1 tan x 2 2 2 lim tan x  0 B sin x  x  tan x x 0 C tan x x A O 1
  • 10. Differentiating Trig lim sin x  0 x 0 Area AOC  Area Sector OAC  Area AOB 1 1 2 1 lim cos x  1 x 0 11 sin x  1 x  1 tan x 2 2 2 lim tan x  0 B sin x  x  tan x x 0 sin x x tan x   sin x sin x sin x C tan x x A O 1
  • 11. Differentiating Trig lim sin x  0 x 0 Area AOC  Area Sector OAC  Area AOB 1 1 2 1 lim cos x  1 x 0 11 sin x  1 x  1 tan x 2 2 2 lim tan x  0 B sin x  x  tan x x 0 sin x x tan x   sin x sin x sin x C tan x x 1 1  sin x cos x x A O 1
  • 12. Differentiating Trig lim sin x  0 x 0 Area AOC  Area Sector OAC  Area AOB 1 1 2 1 lim cos x  1 x 0 11 sin x  1 x  1 tan x 2 2 2 lim tan x  0 B sin x  x  tan x x 0 sin x x tan x   sin x sin x sin x C tan x x 1 1  sin x cos x x A as x  0 O 1 x 1 1 sin x
  • 13. Differentiating Trig lim sin x  0 x 0 Area AOC  Area Sector OAC  Area AOB 1 1 2 1 lim cos x  1 x 0 11 sin x  1 x  1 tan x 2 2 2 lim tan x  0 B sin x  x  tan x x 0 sin x x tan x   sin x sin x sin x C tan x x 1 1  sin x cos x x A as x  0 O 1 x 1 1 sin x x lim 1 x 0 sin x
  • 14. 5x e.g. i  lim x 0 sin 5 x
  • 15. 5x e.g. i  lim 1 x 0 sin 5 x
  • 16. 5x e.g. i  lim 1 ii  lim x x 0 sin 5 x x 0 sin 3 x
  • 17. 5x e.g. i  lim 1 ii  lim x  lim  1 3x x 0 sin 5 x x 0 sin 3 x x 0 3 sin 3 x
  • 18. 5x e.g. i  lim 1 ii  lim x  lim  1 3x x 0 sin 5 x x 0 sin 3 x x 0 3 sin 3 x 1  3
  • 19. 5x e.g. i  lim 1 ii  lim x  lim  1 3x x 0 sin 5 x x 0 sin 3 x x 0 3 sin 3 x y  sin x 1  3
  • 20. 5x e.g. i  lim 1 ii  lim x  lim  1 3x x 0 sin 5 x x 0 sin 3 x x 0 3 sin 3 x y  sin x 1  dy sin  x  h   sin x 3  lim dx x 0 h
  • 21. 5x e.g. i  lim 1 ii  lim x  lim  1 3x x 0 sin 5 x x 0 sin 3 x x 0 3 sin 3 x y  sin x 1  dy sin  x  h   sin x 3  lim dx x 0 h sin x cosh  cos x sinh  sin x  lim x 0 h
  • 22. 5x e.g. i  lim 1 ii  lim x  lim  1 3x x 0 sin 5 x x 0 sin 3 x x 0 3 sin 3 x y  sin x 1  dy sin  x  h   sin x 3  lim dx x 0 h sin x cosh  cos x sinh  sin x  lim x 0 h cosh  1   lim cos x sinh     sin x  x 0  h   h 
  • 23. 5x e.g. i  lim 1 ii  lim x  lim  1 3x x 0 sin 5 x x 0 sin 3 x x 0 3 sin 3 x y  sin x 1  dy sin  x  h   sin x 3  lim dx x 0 h sin x cosh  cos x sinh  sin x  lim x 0 h cosh  1   lim cos x sinh     sin x  x 0  h   h   h   2 cos 2  2   sinh   2  lim cos x  sin x  x 0  h    h    
  • 24. 5x e.g. i  lim 1 ii  lim x  lim  1 3x x 0 sin 5 x x 0 sin 3 x x 0 3 sin 3 x y  sin x 1  dy sin  x  h   sin x 3  lim dx x 0 h sin x cosh  cos x sinh  sin x  lim x 0 h cosh  1   lim cos x sinh     sin x  x 0  h   h   h   2 cos 2  2   sinh   2  cos 2  2 cos 2   1  lim cos x  sin x x 0  h    h    
  • 25. 5x e.g. i  lim 1 ii  lim x  lim  1 3x x 0 sin 5 x x 0 sin 3 x x 0 3 sin 3 x y  sin x 1  dy sin  x  h   sin x 3  lim dx x 0 h sin x cosh  cos x sinh  sin x  lim x 0 h cosh  1   lim cos x sinh     sin x  x 0  h   h   h   2 cos 2  2   sinh   2  cos 2  2 cos 2   1  lim cos x  sin x x 0  h    h      2 h  sinh    2 sin   lim cos x  sin x 2 x 0  h   h     
  • 26.  2 h  sin   lim cos x sinh     sin x h 2  x 0  h       2 
  • 27.  2 h  sin   lim cos x sinh     sin x h 2  x 0  h       2   h   sinh    sin h  lim cos x  sin x h 2  sin  x 0  h    2   2 
  • 28.  2 h  sin   lim cos x sinh     sin x h 2  x 0  h       2   h   sinh    sin h  lim cos x  sin x h 2  sin  x 0  h    2   2   cos x 1  sin x 0 
  • 29.  2 h  sin   lim cos x sinh     sin x h 2  x 0  h       2   h   sinh    sin h  lim cos x  sin x h 2  sin  x 0  h    2   2   cos x 1  sin x 0   cos x
  • 30.  2 h  sinh   sin  2  lim cos x   sin x h  x 0  h       2   h   sinh   sin h 2  lim cos x   sin x h  sin  x 0  h    2   2  y  sin f  x   cos x 1  sin x 0   cos x
  • 31.  2 h  sin   lim cos x sinh  2    sin x h  x 0  h       2   h   h sin  sinh   2  lim cos x  sin x h  sin  x 0  h    2   2  y  sin f  x   cos x 1  sin x 0  dy  f  x  cos f  x  dx  cos x
  • 32.  2 h  sin   lim cos x sinh  2    sin x h  x 0  h       2   h   h sin  sinh   2  lim cos x  sin x h  sin  x 0  h    2   2  y  sin f  x   cos x 1  sin x 0  dy  f  x  cos f  x  dx  cos x y  cos x
  • 33.  2 h  sin   lim cos x sinh  2    sin x h  x 0  h       2   h   h sin  sinh   2  lim cos x  sin x h  sin  x 0  h    2   2  y  sin f  x   cos x 1  sin x 0  dy  f  x  cos f  x  dx  cos x y  cos x  y  sin   x    2 
  • 34.  2 h  sin   lim cos x sinh  2    sin x h  x 0  h       2   h   h sin  sinh   2  lim cos x  sin x h  sin  x 0  h    2   2  y  sin f  x   cos x 1  sin x 0  dy  f  x  cos f  x  dx  cos x y  cos x  y  sin   x    2     cos  x  dy   dx 2 
  • 35.  2 h  sin   lim cos x sinh  2    sin x h  x 0  h       2   h   h sin  sinh   2  lim cos x  sin x h  sin  x 0  h    2   2  y  sin f  x   cos x 1  sin x 0  dy  f  x  cos f  x  dx  cos x y  cos x  y  sin   x    2     cos  x  dy   dx 2    sin x
  • 36.  2 h  sin   lim cos x sinh  2    sin x h  x 0  h       2   h   h sin  sinh   2  lim cos x  sin x h  sin  x 0  h    2   2  y  sin f  x   cos x 1  sin x 0  dy  f  x  cos f  x  dx  cos x y  cos x  y  sin   x    2  y  cos f  x     cos  x  dy   dx 2    sin x
  • 37.  2 h  sin   lim cos x sinh  2    sin x h  x 0  h       2   h   h sin  sinh   2  lim cos x  sin x h  sin  x 0  h    2   2  y  sin f  x   cos x 1  sin x 0  dy  f  x  cos f  x  dx  cos x y  cos x  y  sin   x    2  y  cos f  x     cos  x  dy   f  x  sin f  x  dy   dx 2  dx   sin x
  • 39. y  tan x sin x y cos x
  • 40. y  tan x sin x y cos x dy cos x cos x   sin x  sin x   dx cos 2 x cos 2 x  sin 2 x  cos 2 x
  • 41. y  tan x sin x y cos x dy cos x cos x   sin x  sin x   dx cos 2 x cos 2 x  sin 2 x  cos 2 x 1  cos 2 x  sec 2 x
  • 42. y  tan x sin x y cos x dy cos x cos x   sin x  sin x   dx cos 2 x cos 2 x  sin 2 x  cos 2 x 1  cos 2 x  sec 2 x y  tan f  x 
  • 43. y  tan x sin x y cos x dy cos x cos x   sin x  sin x   dx cos 2 x cos 2 x  sin 2 x  cos 2 x 1  cos 2 x  sec 2 x y  tan f  x  dy  f  x  sec 2 f  x  dx
  • 44. y  tan x e.g. i  y  sin x 3 sin x y cos x dy cos x cos x   sin x  sin x   dx cos 2 x cos 2 x  sin 2 x  cos 2 x 1  cos 2 x  sec 2 x y  tan f  x  dy  f  x  sec 2 f  x  dx
  • 45. y  tan x e.g. i  y  sin x 3 dy sin x  3 x 2 cos x 3 y dx cos x dy cos x cos x   sin x  sin x   dx cos 2 x cos 2 x  sin 2 x  cos 2 x 1  cos 2 x  sec 2 x y  tan f  x  dy  f  x  sec 2 f  x  dx
  • 46. y  tan x e.g. i  y  sin x 3 dy sin x  3 x 2 cos x 3 y dx cos x dy cos x cos x   sin x  sin x  1  ii  y  tan dx cos 2 x x cos 2 x  sin 2 x  cos 2 x 1  cos 2 x  sec 2 x y  tan f  x  dy  f  x  sec 2 f  x  dx
  • 47. y  tan x e.g. i  y  sin x 3 dy sin x  3 x 2 cos x 3 y dx cos x dy cos x cos x   sin x  sin x  1  ii  y  tan dx cos 2 x x dy 1 1 cos 2 x  sin 2 x   2 sec 2  dx x x cos 2 x 1  cos 2 x  sec 2 x y  tan f  x  dy  f  x  sec 2 f  x  dx
  • 48. y  tan x e.g. i  y  sin x 3 dy sin x  3 x 2 cos x 3 y dx cos x dy cos x cos x   sin x  sin x  1  ii  y  tan dx cos 2 x x dy 1 1 cos x  sin x 2 2   2 sec 2  2 dx x x cos x  1 iii  y  log cos x cos 2 x  sec 2 x y  tan f  x  dy  f  x  sec 2 f  x  dx
  • 49. y  tan x e.g. i  y  sin x 3 dy sin x  3 x 2 cos x 3 y dx cos x dy cos x cos x   sin x  sin x  1  ii  y  tan dx cos 2 x x dy 1 1 cos x  sin x 2 2   2 sec 2  2 dx x x cos x  1 iii  y  log cos x cos 2 x dy  sin x   sec x 2 dx cos x y  tan f  x  dy  f  x  sec 2 f  x  dx
  • 50. y  tan x e.g. i  y  sin x 3 dy sin x  3 x 2 cos x 3 y dx cos x dy cos x cos x   sin x  sin x  1  ii  y  tan dx cos 2 x x dy 1 1 cos x  sin x 2 2   2 sec 2  2 dx x x cos x  1 iii  y  log cos x cos 2 x dy  sin x   sec x 2 dx cos x   tan x y  tan f  x  dy  f  x  sec 2 f  x  dx
  • 51. y  tan x e.g. i  y  sin x 3 dy sin x  3 x 2 cos x 3 y dx cos x dy cos x cos x   sin x  sin x  1  ii  y  tan dx cos 2 x x dy 1 1 cos x  sin x 2 2   2 sec 2  2 dx x x cos x  1 iii  y  log cos x iv  y  tan 5 x cos 2 x dy  sin x   sec x 2 dx cos x   tan x y  tan f  x  dy  f  x  sec 2 f  x  dx
  • 52. y  tan x e.g. i  y  sin x 3 dy sin x  3 x 2 cos x 3 y dx cos x dy cos x cos x   sin x  sin x  1  ii  y  tan dx cos 2 x x dy 1 1 cos x  sin x 2 2   2 sec 2  2 dx x x cos x  1 iii  y  log cos x iv  y  tan 5 x cos 2 x dy  sin x dy   5 tan 4 x sec 2 x  sec 2 x dx cos x dx   tan x y  tan f  x  dy  f  x  sec 2 f  x  dx
  • 53. y  tan x e.g. i  y  sin x 3 dy sin x  3 x 2 cos x 3 y dx cos x dy cos x cos x   sin x  sin x  1  ii  y  tan dx cos 2 x x dy 1 1 cos x  sin x 2 2   2 sec 2  2 dx x x cos x  1 iii  y  log cos x iv  y  tan 5 x cos 2 x dy  sin x dy   5 tan 4 x sec 2 x  sec 2 x dx cos x dx   tan x y  tan f  x  v  y  cos e x dy  f  x  sec 2 f  x  dx
  • 54. y  tan x e.g. i  y  sin x 3 dy sin x  3 x 2 cos x 3 y dx cos x dy cos x cos x   sin x  sin x  1  ii  y  tan dx cos 2 x x dy 1 1 cos x  sin x 2 2   2 sec 2  2 dx x x cos x  1 iii  y  log cos x iv  y  tan 5 x cos 2 x dy  sin x dy   5 tan 4 x sec 2 x  sec 2 x dx cos x dx   tan x y  tan f  x  v  y  cos e x dy  f  x  sec 2 f  x  dy dx  e x sin e x dx
  • 55. Exercise 14F; 2, 4, 5 Exercise 14G; 2ace etc, 3ace etc, 5ace etc, 6, 7ab(i), 8, 12, 13c, 16a* Exercise 14H; 2 ac, 4bd, 6, 8, 14, 17, 20