AP EAMCET202123 Aug 2021Evening ShiftMathematicsIndefinite IntegrationActual
(1- x) cosec ^2 x d x is equal to
Options
- A( x 2 )+c
- B- ( x 2 )+c
- C2 ( x 2 )+c
- D-2 ( x 2 )+c
Correct answer
A. ( x 2 )+c
Step-by-step solution
Let I= (1- x) cosec ^2 x d xI= cosec ^2 x d x- x cosec ^2 x d x aligned & =- x- x cosec x d x & =- x+ cosec x+C aligned = 1- x x +C [ 1- x=2 ^2 x 2 ]= 2 ^2 x / 2 2 x / 2 x / 2 +CI= ( x 2 )+C