Question

Question #e4c5f

Answer 1

`tan^4 x`

Explanation:

`sec^2 x -1` is `tan^2 x`

`csc^2 x-1` is `cot^2 x`

Therefore `(sec^2 x-1)/(csc^2 x -1) = tan^2 x / cot^2 x= tan^4 x`