Question

Question #11cd8

Answer 1

Prove trig identity

Explanation:

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

`= (cancel((1 - cos x))(1 - cos x))/(cancel((1 - cos x))( 1 + cos x))`

`= (1 - cos x)/(1 + cos x)`