Solve this : 10 The value of secsin-1-sin50 π9+cos-1 cos-31π9 is equal to (a) sec 10π9 - Maths - Inverse Trigonometric Functions

Question

Solve this :

10   The   value   of   sec sin - 1 - sin 50
  π 9 + cos - 1   cos - 31 π 9   is  
equal   to   ( a )   sec   10 π 9  
                 
  ( b )   sec π 9          
                  ( c
)   1                
                ( d )
  - 1

Antash Manocha · Accepted Answer

Solve this : 10 . The value of sec sin - 1 - sin 50 π 9 + cos - 1 cos - 31 π 9 is equal to ( a ) sec 10 π 9 ( b ) sec π 9 ( c ) 1 ( d ) - 1

Solve this :

$10 . The value of \sec [\sin^{- 1} (- \sin \frac{50 π}{9}) + \cos^{- 1} \cos (- \frac{31 π}{9})] is equal to (a) \sec \frac{10 π}{9} (b) \sec \frac{π}{9} (c) 1 (d) - 1$