Question

Which expression is equivalent to sin^2 x-sin x - 2/sin x -2

A. sin x + 1

B. sin x − 1

C. sin2x

D. -sin2x

Answer 1

A. sin x+1

Explanation:

this is the correct answer for edmentum users

Answer 2

Set sin x to a variable, i.e. u

u^2-u-2/u-2.

Factor:

(u-2)(u+1)/(u-2)

Simplify by canceling the u-2s...

leaving u+1. Since we substituted u for sin x...
the answer is A. sin x + 1