Question

Question #6c2b0

Answer 1

Refer to the explanation below.

Explanation:

`LHS=(tan^2x-1)/(cot^2x-1)`

`=(tan^2x-1)/((1/tan^2x)-1)`

`=-(1-tan^2x)*tan^2x/((1-tan^2x)`

`=-tan^2x`

`=-(sec^2x-1)`

`=1-sec^2x=RHS`