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Differentiating Inverse Trig
Differentiating Inverse Trig
 y  sin 1 x
Differentiating Inverse Trig
y  sin 1 x
x  sin y
Differentiating Inverse Trig
 y  sin 1 x
 x  sin y
dx
    cos y
dy
Differentiating Inverse Trig
  y  sin 1 x
  x  sin y
 dx
     cos y
dy
dy      1
    
dx cos y
Differentiating Inverse Trig
  y  sin 1 x
  x  sin y
 dx
      cos y
dy
dy      1
    
dx cos y
          1
    
        cos 2 y
           1
   
       1  sin 2 y
        1
   
       1 x2
Differentiating Inverse Trig
  y  sin 1 x       y  cos 1 x
  x  sin y
 dx
      cos y
dy
dy      1
    
dx cos y
          1
    
        cos 2 y
           1
   
       1  sin 2 y
        1
   
       1 x2
Differentiating Inverse Trig
  y  sin 1 x       y  cos 1 x
  x  sin y          x  cos y
 dx
      cos y
dy
dy      1
    
dx cos y
          1
    
        cos 2 y
           1
   
       1  sin 2 y
        1
   
       1 x2
Differentiating Inverse Trig
  y  sin 1 x        y  cos 1 x
  x  sin y           x  cos y
 dx                  dx
      cos y              sin y
dy                   dy
dy      1
    
dx cos y
          1
    
        cos 2 y
           1
   
       1  sin 2 y
        1
   
       1 x2
Differentiating Inverse Trig
  y  sin 1 x        y  cos 1 x
  x  sin y           x  cos y
 dx                  dx
      cos y              sin y
dy                   dy
dy      1            dy    1
                       
dx cos y             dx sin y
          1
    
        cos 2 y
           1
   
       1  sin 2 y
        1
   
       1 x2
Differentiating Inverse Trig
  y  sin 1 x        y  cos 1 x
  x  sin y           x  cos y
 dx                  dx
      cos y              sin y
dy                   dy
dy      1            dy    1
                       
dx cos y             dx sin y
          1                  1
                       
        cos 2 y             sin 2 y
           1                   1
                       
       1  sin 2 y          1  cos 2 y
        1                    1
                       
       1 x2                1 x2
Differentiating Inverse Trig
  y  sin 1 x        y  cos 1 x        y  tan 1 x
  x  sin y           x  cos y
 dx                  dx
      cos y              sin y
dy                   dy
dy      1            dy    1
                       
dx cos y             dx sin y
          1                  1
                       
        cos 2 y             sin 2 y
           1                   1
                       
       1  sin 2 y          1  cos 2 y
        1                    1
                       
       1 x2                1 x2
Differentiating Inverse Trig
  y  sin 1 x        y  cos 1 x        y  tan 1 x
  x  sin y           x  cos y           x  tan y
 dx                  dx
      cos y              sin y
dy                   dy
dy      1            dy    1
                       
dx cos y             dx sin y
          1                  1
                       
        cos 2 y             sin 2 y
           1                   1
                       
       1  sin 2 y          1  cos 2 y
        1                    1
                       
       1 x2                1 x2
Differentiating Inverse Trig
  y  sin 1 x        y  cos 1 x         y  tan 1 x
  x  sin y           x  cos y            x  tan y
 dx                  dx                   dx
      cos y              sin y             sec 2 y
dy                   dy                   dy
dy      1            dy    1
                       
dx cos y             dx sin y
          1                  1
                       
        cos 2 y             sin 2 y
           1                   1
                       
       1  sin 2 y          1  cos 2 y
        1                    1
                       
       1 x2                1 x2
Differentiating Inverse Trig
  y  sin 1 x        y  cos 1 x         y  tan 1 x
  x  sin y           x  cos y            x  tan y
 dx                  dx                   dx
      cos y              sin y             sec 2 y
dy                   dy                   dy
dy      1            dy    1             dy      1
                                           
dx cos y             dx sin y             dx sec 2 y
          1                  1
                       
        cos 2 y             sin 2 y
           1                   1
                       
       1  sin 2 y          1  cos 2 y
        1                    1
                       
       1 x2                1 x2
Differentiating Inverse Trig
  y  sin 1 x        y  cos 1 x         y  tan 1 x
  x  sin y           x  cos y            x  tan y
 dx                  dx                   dx
      cos y              sin y             sec 2 y
dy                   dy                   dy
dy      1            dy    1             dy      1
                                           
dx cos y             dx sin y             dx sec 2 y
          1                  1                     1
                                           
        cos 2 y             sin 2 y            1  tan 2 y
           1                   1                 1
                                           
       1  sin 2 y          1  cos 2 y        1 x2
        1                    1
                       
       1 x2                1 x2
In general;
               x
  y  sin 1
               a
In general;
               x
  y  sin 1
               a
 dy     1
    
 dx   a2  x2
In general;
            x                  x
  y  sin1
                  y  cos 1
            a                  a
 dy       1
    
 dx     a2  x2
In general;
            x              x
  y  sin1
                   y  cos 1
            a              a
 dy       1       dy    1
                    
 dx     a2  x2   dx   a2  x2
In general;
            x              x                  x
  y  sin1
                   y  cos 1    y  tan 1
            a              a                  a
 dy       1       dy    1
                    
 dx     a2  x2   dx   a2  x2
In general;
            x              x                  x
  y  sin1
                   y  cos 1    y  tan 1
            a              a                  a
 dy       1       dy    1       dy     a
                                   2
 dx     a2  x2   dx   a2  x2   dx a  x 2
In general;
            x                   x                  x
  y  sin  1
                        y  cos 1    y  tan 1
            a                   a                  a
 dy       1            dy    1       dy     a
                                        2
 dx     a2  x2        dx   a2  x2   dx a  x 2

  y  sin 1 f  x 
In general;
            x                    x                  x
  y  sin  1
                         y  cos 1    y  tan 1
            a                    a                  a
 dy       1             dy    1       dy     a
                                         2
 dx     a2  x2         dx   a2  x2   dx a  x 2

  y  sin 1 f  x 
 dy      f  x 
    
      1   f  x 
                    2
 dx
In general;
            x                    x                         x
  y  sin  1
                         y  cos 1           y  tan 1
            a                    a                         a
 dy       1             dy    1              dy     a
                                                2
 dx     a2  x2         dx   a2  x2          dx a  x 2

  y  sin 1 f  x      y  cos 1 f  x 
 dy      f  x 
    
      1   f  x 
                    2
 dx
In general;
            x                    x                          x
  y  sin  1
                         y  cos 1            y  tan 1
            a                    a                          a
 dy       1             dy    1               dy     a
                                                 2
 dx     a2  x2         dx   a2  x2           dx a  x 2

  y  sin 1 f  x      y  cos 1 f  x 
 dy      f  x        dy     f  x 
                          
      1   f  x          1   f  x 
                                           2
 dx                 2   dx
In general;
            x                    x                          x
  y  sin  1
                         y  cos 1            y  tan 1
            a                    a                          a
 dy       1             dy    1               dy     a
                                                 2
 dx     a2  x2         dx   a2  x2           dx a  x 2

  y  sin 1 f  x      y  cos 1 f  x      y  tan 1 f  x 
 dy      f  x        dy     f  x 
                          
      1   f  x          1   f  x 
                                           2
 dx                 2   dx
In general;
            x                    x                          x
  y  sin  1
                         y  cos 1            y  tan 1
            a                    a                          a
 dy       1             dy    1               dy     a
                                                 2
 dx     a2  x2         dx   a2  x2           dx a  x 2

  y  sin 1 f  x      y  cos 1 f  x      y  tan 1 f  x 
 dy      f  x        dy     f  x        dy     f  x 
                                                
 dx   1   f  x 
                    2   dx   1   f  x 
                                           2
                                               dx 1   f  x 2
In general;
              x                     x                          x
    y  sin   1
                            y  cos 1            y  tan 1
              a                     a                          a
   dy       1              dy    1               dy     a
                                                    2
   dx     a2  x2          dx   a2  x2           dx a  x 2

     y  sin 1 f  x      y  cos 1 f  x      y  tan 1 f  x 
   dy      f  x         dy     f  x        dy     f  x 
                                                   
   dx   1   f  x 
                      2    dx   1   f  x 
                                              2
                                                  dx 1   f  x 2

e.g. i  y  sin 1 5 x
In general;
              x                     x                          x
    y  sin   1
                            y  cos 1            y  tan 1
              a                     a                          a
   dy       1              dy    1               dy     a
                                                    2
   dx     a2  x2          dx   a2  x2           dx a  x 2

     y  sin 1 f  x      y  cos 1 f  x      y  tan 1 f  x 
   dy      f  x         dy     f  x        dy     f  x 
                                                   
   dx   1   f  x 
                      2    dx   1   f  x 
                                              2
                                                  dx 1   f  x 2

e.g. i  y  sin 1 5 x
       dy      5
          
       dx   1  25 x 2
In general;
              x                     x                                 x
    y  sin   1
                            y  cos 1                   y  tan 1
              a                     a                                 a
   dy       1              dy    1                      dy     a
                                                           2
   dx     a2  x2          dx   a2  x2                  dx a  x 2

     y  sin 1 f  x      y  cos 1 f  x             y  tan 1 f  x 
   dy      f  x         dy     f  x               dy     f  x 
                                                          
   dx   1   f  x 
                      2    dx   1   f  x 
                                              2
                                                         dx 1   f  x 2

e.g. i  y  sin 1 5 x          ii  y  cos 1 e x
       dy      5
          
       dx   1  25 x 2
In general;
              x                     x                                 x
    y  sin   1
                            y  cos 1                   y  tan 1
              a                     a                                 a
   dy       1              dy    1                      dy     a
                                                           2
   dx     a2  x2          dx   a2  x2                  dx a  x 2

     y  sin 1 f  x      y  cos 1 f  x             y  tan 1 f  x 
   dy      f  x         dy     f  x               dy     f  x 
                                                          
   dx   1   f  x 
                      2    dx   1   f  x 
                                              2
                                                         dx 1   f  x 2

e.g. i  y  sin 1 5 x          ii  y  cos 1 e x
       dy      5                     dy    ex
                                       
       dx   1  25 x 2               dx   1 e 2 x
 x
iii  y  sin  
            1

               3
 x
iii  y  sin  
             1

                 3
   dy          1
         
   dx        9  x2
 x
iii  y  sin             y  sin 1  
             1                          x
                        OR               
                 3                    3
   dy          1
         
   dx        9  x2
 x
iii  y  sin              y  sin 1  
             1                            x
                        OR                
                 3                     3
   dy          1                     1
                            dy
   dx        9  x2              3 2
                             dx          x
                                    1
                                          9
 x
iii  y  sin              y  sin 1  
             1                            x
                        OR                
                 3                     3
   dy          1                     1
                            dy
   dx        9  x2              3 2
                             dx          x
                                    1
                                          9
                                       1
                                      3
                                  1
                                      9  x2
                                  3
                                      1
                                
                                    9  x2
 x
iii  y  sin                y  sin 1  
                 1                          x
                          OR                
                 3                       3
   dy          1                       1
                              dy
   dx        9  x2                3 2
                               dx          x
                                      1
                                            9
                                         1
                                        3
                                    1
                                        9  x2
                                    3
                                        1
                                  
 iv  y  e   cos 1 x
                                      9  x2
 x
iii  y  sin                y  sin 1  
                 1                          x
                          OR                
                 3                       3
   dy          1                       1
                              dy
   dx        9  x2                3 2
                               dx          x
                                      1
                                            9
                                         1
                                        3
                                    1
                                        9  x2
                                    3
                                        1
                                  
 iv  y  e   cos 1 x
                                      9  x2
    dy     1 cos 1 x
               e
    dx   1 x 2
 x
iii  y  sin                    y  sin 1  
                 1                              x
                              OR                
                 3                           3
   dy          1                           1
                                  dy
   dx        9  x2                    3 2
                                   dx          x
                                          1
                                                9
                                             1
                                            3
                                        1
                                            9  x2
                                        3
                                            1
                                      
 iv  y  e   cos 1 x
                                          9  x2
    dy     1 cos 1 x
               e
    dx   1 x 2

                   cos 1 x
          e
        
           1 x2
v  y  tan x 
            1   3
v  y  tan x 
            1   3




     3tan x  
 dy        1  2    1
 dx               1 x2
v  y  tan x 
            1    3




     3tan x  
 dy        1  2    1
 dx               1 x2
       3tan x 
             1       2

     
         1 x2
v  y  tan x 
               1     3




      3tan x  
  dy        1  2    1
  dx               1 x2
         3tan x 
                 1       2

       
           1 x2

vi  y  x 2 tan 1 x 3
v  y  tan x 
               1     3




      3tan x  
  dy        1  2    1
  dx               1 x2
         3tan x 
                 1       2

       
           1 x2

vi  y  x 2 tan 1 x 3
         2  3x     
      x           tan 1 x 3 2 x 
                 2
  dy
  dx        1  x6 
v  y  tan x 
               1     3




      3tan x  
  dy        1  2    1
  dx               1 x2
         3tan x 
                 1       2

       
           1 x2

vi  y  x 2 tan 1 x 3
         2  3x     
      x           tan 1 x 3 2 x 
                 2
  dy
  dx        1  x6 
          3x 4
                2 x tan 1 x 3
         1  x6
v  y  tan x 
               1     3




      3tan x  
  dy        1  2    1
  dx               1 x2
         3tan x 
                 1       2

       
           1 x2

vi  y  x 2 tan 1 x 3                      Exercise 1D; 2ace etc, 3bd,
                                               4a, 5, 6a, 9ace etc, 11, 13,
         2  3x     
      x           tan 1 x 3 2 x 
                 2
  dy
                                                        14, 20a*
  dx        1  x6 
          3x 4
                2 x tan 1 x 3
         1  x6

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12X1 T05 04 differentiating inverse trig (2010)

  • 2. Differentiating Inverse Trig y  sin 1 x
  • 3. Differentiating Inverse Trig y  sin 1 x x  sin y
  • 4. Differentiating Inverse Trig y  sin 1 x x  sin y dx  cos y dy
  • 5. Differentiating Inverse Trig y  sin 1 x x  sin y dx  cos y dy dy 1  dx cos y
  • 6. Differentiating Inverse Trig y  sin 1 x x  sin y dx  cos y dy dy 1  dx cos y 1  cos 2 y 1  1  sin 2 y 1  1 x2
  • 7. Differentiating Inverse Trig y  sin 1 x y  cos 1 x x  sin y dx  cos y dy dy 1  dx cos y 1  cos 2 y 1  1  sin 2 y 1  1 x2
  • 8. Differentiating Inverse Trig y  sin 1 x y  cos 1 x x  sin y x  cos y dx  cos y dy dy 1  dx cos y 1  cos 2 y 1  1  sin 2 y 1  1 x2
  • 9. Differentiating Inverse Trig y  sin 1 x y  cos 1 x x  sin y x  cos y dx dx  cos y   sin y dy dy dy 1  dx cos y 1  cos 2 y 1  1  sin 2 y 1  1 x2
  • 10. Differentiating Inverse Trig y  sin 1 x y  cos 1 x x  sin y x  cos y dx dx  cos y   sin y dy dy dy 1 dy 1   dx cos y dx sin y 1  cos 2 y 1  1  sin 2 y 1  1 x2
  • 11. Differentiating Inverse Trig y  sin 1 x y  cos 1 x x  sin y x  cos y dx dx  cos y   sin y dy dy dy 1 dy 1   dx cos y dx sin y 1 1   cos 2 y sin 2 y 1 1   1  sin 2 y 1  cos 2 y 1 1   1 x2 1 x2
  • 12. Differentiating Inverse Trig y  sin 1 x y  cos 1 x y  tan 1 x x  sin y x  cos y dx dx  cos y   sin y dy dy dy 1 dy 1   dx cos y dx sin y 1 1   cos 2 y sin 2 y 1 1   1  sin 2 y 1  cos 2 y 1 1   1 x2 1 x2
  • 13. Differentiating Inverse Trig y  sin 1 x y  cos 1 x y  tan 1 x x  sin y x  cos y x  tan y dx dx  cos y   sin y dy dy dy 1 dy 1   dx cos y dx sin y 1 1   cos 2 y sin 2 y 1 1   1  sin 2 y 1  cos 2 y 1 1   1 x2 1 x2
  • 14. Differentiating Inverse Trig y  sin 1 x y  cos 1 x y  tan 1 x x  sin y x  cos y x  tan y dx dx dx  cos y   sin y  sec 2 y dy dy dy dy 1 dy 1   dx cos y dx sin y 1 1   cos 2 y sin 2 y 1 1   1  sin 2 y 1  cos 2 y 1 1   1 x2 1 x2
  • 15. Differentiating Inverse Trig y  sin 1 x y  cos 1 x y  tan 1 x x  sin y x  cos y x  tan y dx dx dx  cos y   sin y  sec 2 y dy dy dy dy 1 dy 1 dy 1    dx cos y dx sin y dx sec 2 y 1 1   cos 2 y sin 2 y 1 1   1  sin 2 y 1  cos 2 y 1 1   1 x2 1 x2
  • 16. Differentiating Inverse Trig y  sin 1 x y  cos 1 x y  tan 1 x x  sin y x  cos y x  tan y dx dx dx  cos y   sin y  sec 2 y dy dy dy dy 1 dy 1 dy 1    dx cos y dx sin y dx sec 2 y 1 1 1    cos 2 y sin 2 y 1  tan 2 y 1 1 1    1  sin 2 y 1  cos 2 y 1 x2 1 1   1 x2 1 x2
  • 17. In general; x y  sin 1 a
  • 18. In general; x y  sin 1 a dy 1  dx a2  x2
  • 19. In general; x x y  sin1 y  cos 1 a a dy 1  dx a2  x2
  • 20. In general; x x y  sin1 y  cos 1 a a dy 1 dy 1   dx a2  x2 dx a2  x2
  • 21. In general; x x x y  sin1 y  cos 1 y  tan 1 a a a dy 1 dy 1   dx a2  x2 dx a2  x2
  • 22. In general; x x x y  sin1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2
  • 23. In general; x x x y  sin 1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2 y  sin 1 f  x 
  • 24. In general; x x x y  sin 1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2 y  sin 1 f  x  dy f  x   1   f  x  2 dx
  • 25. In general; x x x y  sin 1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2 y  sin 1 f  x  y  cos 1 f  x  dy f  x   1   f  x  2 dx
  • 26. In general; x x x y  sin 1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2 y  sin 1 f  x  y  cos 1 f  x  dy f  x  dy  f  x    1   f  x  1   f  x  2 dx 2 dx
  • 27. In general; x x x y  sin 1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2 y  sin 1 f  x  y  cos 1 f  x  y  tan 1 f  x  dy f  x  dy  f  x    1   f  x  1   f  x  2 dx 2 dx
  • 28. In general; x x x y  sin 1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2 y  sin 1 f  x  y  cos 1 f  x  y  tan 1 f  x  dy f  x  dy  f  x  dy f  x     dx 1   f  x  2 dx 1   f  x  2 dx 1   f  x 2
  • 29. In general; x x x y  sin 1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2 y  sin 1 f  x  y  cos 1 f  x  y  tan 1 f  x  dy f  x  dy  f  x  dy f  x     dx 1   f  x  2 dx 1   f  x  2 dx 1   f  x 2 e.g. i  y  sin 1 5 x
  • 30. In general; x x x y  sin 1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2 y  sin 1 f  x  y  cos 1 f  x  y  tan 1 f  x  dy f  x  dy  f  x  dy f  x     dx 1   f  x  2 dx 1   f  x  2 dx 1   f  x 2 e.g. i  y  sin 1 5 x dy 5  dx 1  25 x 2
  • 31. In general; x x x y  sin 1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2 y  sin 1 f  x  y  cos 1 f  x  y  tan 1 f  x  dy f  x  dy  f  x  dy f  x     dx 1   f  x  2 dx 1   f  x  2 dx 1   f  x 2 e.g. i  y  sin 1 5 x ii  y  cos 1 e x dy 5  dx 1  25 x 2
  • 32. In general; x x x y  sin 1 y  cos 1 y  tan 1 a a a dy 1 dy 1 dy a    2 dx a2  x2 dx a2  x2 dx a  x 2 y  sin 1 f  x  y  cos 1 f  x  y  tan 1 f  x  dy f  x  dy  f  x  dy f  x     dx 1   f  x  2 dx 1   f  x  2 dx 1   f  x 2 e.g. i  y  sin 1 5 x ii  y  cos 1 e x dy 5 dy  ex   dx 1  25 x 2 dx 1 e 2 x
  • 33.  x iii  y  sin   1 3
  • 34.  x iii  y  sin   1 3 dy 1  dx 9  x2
  • 35.  x iii  y  sin   y  sin 1   1 x OR   3 3 dy 1  dx 9  x2
  • 36.  x iii  y  sin   y  sin 1   1 x OR   3 3 dy 1 1  dy dx 9  x2  3 2 dx x 1 9
  • 37.  x iii  y  sin   y  sin 1   1 x OR   3 3 dy 1 1  dy dx 9  x2  3 2 dx x 1 9 1  3 1 9  x2 3 1  9  x2
  • 38.  x iii  y  sin   y  sin 1   1 x OR   3 3 dy 1 1  dy dx 9  x2  3 2 dx x 1 9 1  3 1 9  x2 3 1  iv  y  e cos 1 x 9  x2
  • 39.  x iii  y  sin   y  sin 1   1 x OR   3 3 dy 1 1  dy dx 9  x2  3 2 dx x 1 9 1  3 1 9  x2 3 1  iv  y  e cos 1 x 9  x2 dy  1 cos 1 x  e dx 1 x 2
  • 40.  x iii  y  sin   y  sin 1   1 x OR   3 3 dy 1 1  dy dx 9  x2  3 2 dx x 1 9 1  3 1 9  x2 3 1  iv  y  e cos 1 x 9  x2 dy  1 cos 1 x  e dx 1 x 2 cos 1 x e  1 x2
  • 41. v  y  tan x  1 3
  • 42. v  y  tan x  1 3  3tan x   dy 1 2 1 dx 1 x2
  • 43. v  y  tan x  1 3  3tan x   dy 1 2 1 dx 1 x2 3tan x  1 2  1 x2
  • 44. v  y  tan x  1 3  3tan x   dy 1 2 1 dx 1 x2 3tan x  1 2  1 x2 vi  y  x 2 tan 1 x 3
  • 45. v  y  tan x  1 3  3tan x   dy 1 2 1 dx 1 x2 3tan x  1 2  1 x2 vi  y  x 2 tan 1 x 3 2  3x   x    tan 1 x 3 2 x  2 dy dx  1  x6 
  • 46. v  y  tan x  1 3  3tan x   dy 1 2 1 dx 1 x2 3tan x  1 2  1 x2 vi  y  x 2 tan 1 x 3 2  3x   x    tan 1 x 3 2 x  2 dy dx  1  x6  3x 4   2 x tan 1 x 3 1  x6
  • 47. v  y  tan x  1 3  3tan x   dy 1 2 1 dx 1 x2 3tan x  1 2  1 x2 vi  y  x 2 tan 1 x 3 Exercise 1D; 2ace etc, 3bd, 4a, 5, 6a, 9ace etc, 11, 13, 2  3x   x    tan 1 x 3 2 x  2 dy 14, 20a* dx  1  x6  3x 4   2 x tan 1 x 3 1  x6