Question

Question #2793f

Answer 1

Refer to the explanation below.

Explanation:

`LHS=(sinx-1)(tanx-secx)`

`=(sinx-1)*(sinx/cosx+1/cosx)`

`=(sinx-1)*((sinx+1)/cosx)`

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

`=-cos^2x/cosx=-cosx=RHS`