Question

Question #30f23

Answer 1

see explanation.

Explanation:

let we take LHS to prove RHS.

`csc x[ csc x + sin (-x)] = 1/sin x[ 1/sin x -sin x]`

`=1/sin^2 x - 1 = (1 -sin^2 x)/sin^2 x = cos^2 x / sin^2 x = cot^2 x`