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Integrating Trig
Integrating Trig
   cosax  b dx
Integrating Trig
                   1
                   sin ax  b   c
   cosax  b dx a
Integrating Trig
                   1
                   sin ax  b   c
   cosax  b dx a
   sinax  b dx
Integrating Trig
                     1
                    sin ax  b   c
   cosax  b dx a
                       1
   sinax  b dx   a cosax  b   c
Integrating Trig
                     1
                    sin ax  b   c
   cosax  b dx a
                       1
   sinax  b dx   a cosax  b   c
   sec 2 ax  b dx
Integrating Trig
                      1
   cosax  b dx a sin ax  b   c
                        1
   sinax  b dx   a cosax  b   c
                      1
   sec ax  b dx  a tanax  b   c
       2
Integrating Trig
                                   1
                cosax  b dx a sin ax  b   c
                                     1
                sinax  b dx   a cosax  b   c
                                   1
                sec ax  b dx  a tanax  b   c
                    2




e.g. i   sin 3 xdx
Integrating Trig
                                     1
                 cosax  b dx a  sin ax  b   c
                                       1
                  sinax  b dx   a cosax  b   c
                                     1
                  sec ax  b dx  a tanax  b   c
                      2



                          1
e.g. i   sin 3 xdx   cos 3 x  c
                          3
Integrating Trig
                                     1
                 cosax  b dx a  sin ax  b   c
                                       1
                  sinax  b dx   a cosax  b   c
                                     1
                  sec ax  b dx  a tanax  b   c
                      2



                          1
e.g. i   sin 3 xdx   cos 3 x  c
                          3
   ii   cos1  5 x dx
Integrating Trig
                                     1
                 cosax  b dx a  sin ax  b   c
                                       1
                  sinax  b dx   a cosax  b   c
                                     1
                  sec ax  b dx  a tanax  b   c
                      2



                          1
e.g. i   sin 3 xdx   cos 3 x  c
                          3
   ii   cos1  5 x dx   1 sin 1  5 x   c
                                5
Integrating Trig
                                     1
                 cosax  b dx a  sin ax  b   c
                                       1
                  sinax  b dx   a cosax  b   c
                                     1
                  sec ax  b dx  a tanax  b   c
                      2



                          1
e.g. i   sin 3 xdx   cos 3 x  c
                          3
   ii   cos1  5 x dx   1 sin 1  5 x   c
                                5
                x dx
  iii   sec  
             2

               2
Integrating Trig
                                     1
                 cosax  b dx a  sin ax  b   c
                                       1
                  sinax  b dx   a cosax  b   c
                                     1
                  sec ax  b dx  a tanax  b   c
                      2



                          1
e.g. i   sin 3 xdx   cos 3 x  c
                          3
   ii   cos1  5 x dx   1 sin 1  5 x   c
                                5
                x dx  2 tan x   c
  iii   sec               
             2

               2             2

     2
iv   sin 2 xdx
    
     6
                             
    2
                     1 cos 2 x  2
iv   sin 2 xdx              
                    2          
                                   6
    6
                          
    2
                     1 cos 2 x  2
iv   sin 2 xdx              
                    2          
                                   6
      6               1             
                     cos   cos 
                      2             3
                          
    2
                     1 cos 2 x  2
iv   sin 2 xdx              
                    2          
                                   6
      6               1             
                     cos   cos 
                      2             3
                      1       1
                     1  
                      2       2
                    3
                  
                    4
                        
                     1      2    v  Find the volume of the solid formed
    2
iv   sin 2 xdx   cos 2 x  
                    2                 when y  sin x between x  0
                                6
      6               1           
                     cos   cos  and x  1 is rotated around the x axis.
                      2           3
                      1     1
                     1  
                      2     2
                    3
                  
                    4
                        
                     1      2    v  Find the volume of the solid formed
    2
iv   sin 2 xdx   cos 2 x  
                    2                 when y  sin x between x  0
                                6
      6               1           
                     cos   cos  and x  1 is rotated around the x axis.
                      2           3
                      1     1              V    y 2 dx
                     1  
                      2     2                     1

                    3                              sin xdx
                                                   0
                    4
                        
                     1        2   v  Find the volume of the solid formed
    2
iv   sin 2 xdx   cos 2 x  
                    2                 when y  sin x between x  0
                                 6
      6               1           
                     cos   cos  and x  1 is rotated around the x axis.
                      2           3
                      1     1              V    y 2 dx
                     1 
                      2     2                     1

                    3                              sin xdx
                                                   0
                    4                                            1

                                                   cos x 
                                                        1
                                                     
                                                              0
                                                               
                        
                     1      2    v  Find the volume of the solid formed
    2
iv   sin 2 xdx   cos 2 x  
                    2                 when y  sin x between x  0
                                6
      6               1           
                     cos   cos  and x  1 is rotated around the x axis.
                      2           3
                      1     1              V    y 2 dx
                     1 
                      2     2                     1

                    3                              sin xdx
                                                   0
                    4                                            1

                                                   cos x 
                                                        1
                                                     
                                                              0
                                                               
                                                 cos   cos 0 
                                                  1  1
                                               2 units 3
                        
                     1      2    v  Find the volume of the solid formed
    2
iv   sin 2 xdx   cos 2 x  
                    2                 when y  sin x between x  0
                                6
      6               1           
                     cos   cos  and x  1 is rotated around the x axis.
                      2           3
                      1     1              V    y 2 dx
                     1 
                      2     2                     1

                    3                              sin xdx
                                                   0
                    4                                            1

                                                   cos x 
                                                        1
                                                     
                                                              0
                                                               
                                                 cos   cos 0 
                                                  1  1
                                               2 units 3
 vi   x sec 2 x 2 dx
                            
                     1      2    v  Find the volume of the solid formed
    2
iv   sin 2 xdx   cos 2 x  
                    2                 when y  sin x between x  0
                                6
      6               1           
                     cos   cos  and x  1 is rotated around the x axis.
                      2           3
                      1     1              V    y 2 dx
                     1 
                      2     2                     1

                    3                              sin xdx
                                                   0
                    4                                            1

                                                   cos x 
                                                        1
                                                     
                                                              0
                                                               
                                                 cos   cos 0 
                                                  1  1

                        1                      2 units 3
 vi   x sec x dx 
                        2
            2   2
                           2 x sec 2 x 2 dx
                         
                     1      2    v  Find the volume of the solid formed
    2
iv   sin 2 xdx   cos 2 x  
                    2                 when y  sin x between x  0
                                6
      6               1           
                     cos   cos  and x  1 is rotated around the x axis.
                      2           3
                      1     1              V    y 2 dx
                     1 
                      2     2                     1

                    3                              sin xdx
                                                   0
                    4                                            1

                                                   cos x 
                                                        1
                                                     
                                                              0
                                                               
                                                 cos   cos 0 
                                                  1  1

                     1                         2 units 3
 vi   x sec x dx 
                     2
            2   2
                        2 x sec 2 x 2 dx

                     1
                     tan x 2  c
                     2
vii   sin 2 xdx
vii   sin 2 xdx   cos2 
vii   sin xdx
          2
                   cos2  cos 2  sin 2 
vii   sin xdx
          2
                   cos2  cos 2  sin 2 
                                                1
                          1  2 sin   sin   1  cos 2 
                                    2       2

                                                2
vii   sin xdx
          2
                   cos2  cos 2  sin 2 
                                                1
                          1  2 sin   sin   1  cos 2 
                                    2       2

                                                2
                                                 1
                          2 cos   1  cos   1  cos 2 
                                  2           2

                                                 2
vii   sin xdx
            2
                               cos2  cos 2  sin 2 
                                                            1
        1                             1  2 sin   sin   1  cos 2 
                                                2       2

    
        2  1  cos 2 x dx                                2
                                                             1
                                      2 cos   1  cos   1  cos 2 
                                              2           2

                                                             2
vii   sin xdx
          2
                            cos2  cos 2  sin 2 
                                                         1
     1                             1  2 sin   sin   1  cos 2 
                                             2       2

    
     2  1  cos 2 x dx                                2
                                                          1
                                   2 cos   1  cos   1  cos 2 
                                           2           2

      x  sin 2 x   c
     1       1                                           2
                       
     2       2        
     x 1
      sin 2 x  c
     2 4
vii   sin xdx
          2
                            cos2  cos 2  sin 2 
                                                         1
     1                             1  2 sin   sin   1  cos 2 
                                             2       2

    
     2  1  cos 2 x dx                                2
                                                          1
                                   2 cos   1  cos   1  cos 2 
                                           2           2

      x  sin 2 x   c
     1       1                                           2
                       
     2       2        
     x 1
      sin 2 x  c
     2 4

 vii   tan xdx
vii   sin xdx
          2
                                 cos2  cos 2  sin 2 
                                                              1
     1                                  1  2 sin   sin   1  cos 2 
                                                  2       2

    
     2  1  cos 2 x dx                                     2
                                                               1
                                        2 cos   1  cos   1  cos 2 
                                                2           2

      x  sin 2 x   c
     1       1                                                2
                       
     2       2        
     x 1
      sin 2 x  c
     2 4

 vii   tan xdx   sin x dx
                     cos x
vii   sin xdx
          2
                                 cos2  cos 2  sin 2 
                                                              1
     1                                  1  2 sin   sin   1  cos 2 
                                                  2       2

    
     2  1  cos 2 x dx                                     2
                                                               1
                                        2 cos   1  cos   1  cos 2 
                                                2           2

      x  sin 2 x   c
     1       1                                                2
                       
     2       2        
     x 1
      sin 2 x  c
     2 4

 vii   tan xdx   sin x dx
                      cos x
                         sin x
                             dx
                        cos x
vii   sin xdx
          2
                                 cos2  cos 2  sin 2 
                                                              1
     1                                  1  2 sin   sin   1  cos 2 
                                                  2       2

    
     2  1  cos 2 x dx                                     2
                                                               1
                                        2 cos   1  cos   1  cos 2 
                                                2           2

      x  sin 2 x   c
     1       1                                                2
                       
     2       2        
     x 1
      sin 2 x  c
     2 4

 vii   tan xdx   sin x dx
                       cos x
                          sin x
                              dx
                         cos x
                     log cos x  c
vii   sin xdx
          2
                                 cos2  cos 2  sin 2 
                                                              1
     1                                  1  2 sin   sin   1  cos 2 
                                                  2       2

    
     2  1  cos 2 x dx                                     2
                                                               1
                                        2 cos   1  cos   1  cos 2 
                                                2           2

      x  sin 2 x   c
     1       1                                                2
                       
     2       2        
     x 1
      sin 2 x  c
     2 4

 vii   tan xdx   sin x dx
                       cos x
                          sin x
                              dx
                         cos x
                     log cos x  c
                    logcos x   c
                                 1


                    log sec x  c
π
    2
ix   cos x sin 7 xdx
     0
π
    2
ix   cos x sin 7 xdx   u  sin x
     0
π
    2
ix   cos x sin 7 xdx    u  sin x
     0                    du  cos xdx
π
    2
ix   cos x sin 7 xdx    u  sin x
     0                    du  cos xdx
                          x  0 ,u  0
                               
                          x       ,u 1
                               2
π
    2
ix   cos x sin 7 xdx    u  sin x
     0
         1                du  cos xdx
       u 7 du           x  0 ,u  0
         0                     
                          x       ,u 1
                               2
π
    2
ix   cos x sin 7 xdx    u  sin x
     0
         1                du  cos xdx
       u 7 du           x  0 ,u  0
         0                     
      1 8 
              1
                          x       ,u 1
      u                     2
      8  0
π
    2
ix   cos x sin 7 xdx    u  sin x
     0
         1                du  cos xdx
       u 7 du           x  0 ,u  0
         0                     
       1 8 
              1
                          x       ,u 1
      u                     2
       8  0
      1  0 
       1 8
       8
       1
     
       8
π
    2
ix   cos x sin 7 xdx                  u  sin x
     0
         1                              du  cos xdx
       u 7 du                         x  0 ,u  0
         0                                  
       1 8 
              1
                                  x  ,u 1
      u                             2
       8  0
      1  0 
       1 8
       8
       1
     
       8
               Exercise 14I; 2ace etc, 3ace etc, 4, 6, 8a, 9ac, 10a,
                           12ace, 13b(i), 14df, 15ace

                  Exercise 14J; 2b, 3bfh, 4a, 5ac, 7, 9, 10, 13, 14, 21, 26

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12 x1 t03 04 integrating trig (2013)

  • 2. Integrating Trig  cosax  b dx
  • 3. Integrating Trig 1  sin ax  b   c  cosax  b dx a
  • 4. Integrating Trig 1  sin ax  b   c  cosax  b dx a  sinax  b dx
  • 5. Integrating Trig 1  sin ax  b   c  cosax  b dx a 1  sinax  b dx   a cosax  b   c
  • 6. Integrating Trig 1  sin ax  b   c  cosax  b dx a 1  sinax  b dx   a cosax  b   c  sec 2 ax  b dx
  • 7. Integrating Trig 1  cosax  b dx a sin ax  b   c 1  sinax  b dx   a cosax  b   c 1  sec ax  b dx  a tanax  b   c 2
  • 8. Integrating Trig 1  cosax  b dx a sin ax  b   c 1  sinax  b dx   a cosax  b   c 1  sec ax  b dx  a tanax  b   c 2 e.g. i   sin 3 xdx
  • 9. Integrating Trig 1  cosax  b dx a  sin ax  b   c 1  sinax  b dx   a cosax  b   c 1  sec ax  b dx  a tanax  b   c 2 1 e.g. i   sin 3 xdx   cos 3 x  c 3
  • 10. Integrating Trig 1  cosax  b dx a  sin ax  b   c 1  sinax  b dx   a cosax  b   c 1  sec ax  b dx  a tanax  b   c 2 1 e.g. i   sin 3 xdx   cos 3 x  c 3 ii   cos1  5 x dx
  • 11. Integrating Trig 1  cosax  b dx a  sin ax  b   c 1  sinax  b dx   a cosax  b   c 1  sec ax  b dx  a tanax  b   c 2 1 e.g. i   sin 3 xdx   cos 3 x  c 3 ii   cos1  5 x dx   1 sin 1  5 x   c 5
  • 12. Integrating Trig 1  cosax  b dx a  sin ax  b   c 1  sinax  b dx   a cosax  b   c 1  sec ax  b dx  a tanax  b   c 2 1 e.g. i   sin 3 xdx   cos 3 x  c 3 ii   cos1  5 x dx   1 sin 1  5 x   c 5  x dx iii   sec   2 2
  • 13. Integrating Trig 1  cosax  b dx a  sin ax  b   c 1  sinax  b dx   a cosax  b   c 1  sec ax  b dx  a tanax  b   c 2 1 e.g. i   sin 3 xdx   cos 3 x  c 3 ii   cos1  5 x dx   1 sin 1  5 x   c 5  x dx  2 tan x   c iii   sec     2 2  2
  • 14. 2 iv   sin 2 xdx  6
  • 15.  2  1 cos 2 x  2 iv   sin 2 xdx      2  6 6
  • 16.  2  1 cos 2 x  2 iv   sin 2 xdx      2  6 6 1     cos   cos  2 3
  • 17.  2  1 cos 2 x  2 iv   sin 2 xdx      2  6 6 1     cos   cos  2 3 1 1    1   2 2 3  4
  • 18.   1 2 v  Find the volume of the solid formed 2 iv   sin 2 xdx   cos 2 x     2  when y  sin x between x  0 6 6 1     cos   cos  and x  1 is rotated around the x axis. 2 3 1 1    1   2 2 3  4
  • 19.   1 2 v  Find the volume of the solid formed 2 iv   sin 2 xdx   cos 2 x     2  when y  sin x between x  0 6 6 1     cos   cos  and x  1 is rotated around the x axis. 2 3 1 1 V    y 2 dx    1   2 2 1 3    sin xdx  0 4
  • 20.   1 2 v  Find the volume of the solid formed 2 iv   sin 2 xdx   cos 2 x     2  when y  sin x between x  0 6 6 1     cos   cos  and x  1 is rotated around the x axis. 2 3 1 1 V    y 2 dx    1  2 2 1 3    sin xdx  0 4 1    cos x  1    0 
  • 21.   1 2 v  Find the volume of the solid formed 2 iv   sin 2 xdx   cos 2 x     2  when y  sin x between x  0 6 6 1     cos   cos  and x  1 is rotated around the x axis. 2 3 1 1 V    y 2 dx    1  2 2 1 3    sin xdx  0 4 1    cos x  1    0   cos   cos 0    1  1  2 units 3
  • 22.   1 2 v  Find the volume of the solid formed 2 iv   sin 2 xdx   cos 2 x     2  when y  sin x between x  0 6 6 1     cos   cos  and x  1 is rotated around the x axis. 2 3 1 1 V    y 2 dx    1  2 2 1 3    sin xdx  0 4 1    cos x  1    0   cos   cos 0    1  1  2 units 3 vi   x sec 2 x 2 dx
  • 23.   1 2 v  Find the volume of the solid formed 2 iv   sin 2 xdx   cos 2 x     2  when y  sin x between x  0 6 6 1     cos   cos  and x  1 is rotated around the x axis. 2 3 1 1 V    y 2 dx    1  2 2 1 3    sin xdx  0 4 1    cos x  1    0   cos   cos 0    1  1 1  2 units 3 vi   x sec x dx  2 2 2 2 x sec 2 x 2 dx
  • 24.   1 2 v  Find the volume of the solid formed 2 iv   sin 2 xdx   cos 2 x     2  when y  sin x between x  0 6 6 1     cos   cos  and x  1 is rotated around the x axis. 2 3 1 1 V    y 2 dx    1  2 2 1 3    sin xdx  0 4 1    cos x  1    0   cos   cos 0    1  1 1  2 units 3 vi   x sec x dx  2 2 2 2 x sec 2 x 2 dx 1  tan x 2  c 2
  • 25. vii   sin 2 xdx
  • 26. vii   sin 2 xdx cos2 
  • 27. vii   sin xdx 2 cos2  cos 2  sin 2 
  • 28. vii   sin xdx 2 cos2  cos 2  sin 2  1  1  2 sin   sin   1  cos 2  2 2 2
  • 29. vii   sin xdx 2 cos2  cos 2  sin 2  1  1  2 sin   sin   1  cos 2  2 2 2 1  2 cos   1  cos   1  cos 2  2 2 2
  • 30. vii   sin xdx 2 cos2  cos 2  sin 2  1 1  1  2 sin   sin   1  cos 2  2 2  2  1  cos 2 x dx 2 1  2 cos   1  cos   1  cos 2  2 2 2
  • 31. vii   sin xdx 2 cos2  cos 2  sin 2  1 1  1  2 sin   sin   1  cos 2  2 2  2  1  cos 2 x dx 2 1  2 cos   1  cos   1  cos 2  2 2   x  sin 2 x   c 1 1 2  2 2  x 1   sin 2 x  c 2 4
  • 32. vii   sin xdx 2 cos2  cos 2  sin 2  1 1  1  2 sin   sin   1  cos 2  2 2  2  1  cos 2 x dx 2 1  2 cos   1  cos   1  cos 2  2 2   x  sin 2 x   c 1 1 2  2 2  x 1   sin 2 x  c 2 4 vii   tan xdx
  • 33. vii   sin xdx 2 cos2  cos 2  sin 2  1 1  1  2 sin   sin   1  cos 2  2 2  2  1  cos 2 x dx 2 1  2 cos   1  cos   1  cos 2  2 2   x  sin 2 x   c 1 1 2  2 2  x 1   sin 2 x  c 2 4 vii   tan xdx   sin x dx cos x
  • 34. vii   sin xdx 2 cos2  cos 2  sin 2  1 1  1  2 sin   sin   1  cos 2  2 2  2  1  cos 2 x dx 2 1  2 cos   1  cos   1  cos 2  2 2   x  sin 2 x   c 1 1 2  2 2  x 1   sin 2 x  c 2 4 vii   tan xdx   sin x dx cos x  sin x   dx cos x
  • 35. vii   sin xdx 2 cos2  cos 2  sin 2  1 1  1  2 sin   sin   1  cos 2  2 2  2  1  cos 2 x dx 2 1  2 cos   1  cos   1  cos 2  2 2   x  sin 2 x   c 1 1 2  2 2  x 1   sin 2 x  c 2 4 vii   tan xdx   sin x dx cos x  sin x   dx cos x   log cos x  c
  • 36. vii   sin xdx 2 cos2  cos 2  sin 2  1 1  1  2 sin   sin   1  cos 2  2 2  2  1  cos 2 x dx 2 1  2 cos   1  cos   1  cos 2  2 2   x  sin 2 x   c 1 1 2  2 2  x 1   sin 2 x  c 2 4 vii   tan xdx   sin x dx cos x  sin x   dx cos x   log cos x  c  logcos x   c 1  log sec x  c
  • 37. π 2 ix   cos x sin 7 xdx 0
  • 38. π 2 ix   cos x sin 7 xdx u  sin x 0
  • 39. π 2 ix   cos x sin 7 xdx u  sin x 0 du  cos xdx
  • 40. π 2 ix   cos x sin 7 xdx u  sin x 0 du  cos xdx x  0 ,u  0  x ,u 1 2
  • 41. π 2 ix   cos x sin 7 xdx u  sin x 0 1 du  cos xdx   u 7 du x  0 ,u  0 0  x ,u 1 2
  • 42. π 2 ix   cos x sin 7 xdx u  sin x 0 1 du  cos xdx   u 7 du x  0 ,u  0 0  1 8  1 x ,u 1  u  2 8  0
  • 43. π 2 ix   cos x sin 7 xdx u  sin x 0 1 du  cos xdx   u 7 du x  0 ,u  0 0  1 8  1 x ,u 1  u  2 8  0  1  0  1 8 8 1  8
  • 44. π 2 ix   cos x sin 7 xdx u  sin x 0 1 du  cos xdx   u 7 du x  0 ,u  0 0  1 8  1 x  ,u 1  u  2 8  0  1  0  1 8 8 1  8 Exercise 14I; 2ace etc, 3ace etc, 4, 6, 8a, 9ac, 10a, 12ace, 13b(i), 14df, 15ace Exercise 14J; 2b, 3bfh, 4a, 5ac, 7, 9, 10, 13, 14, 21, 26