You have not shown the brackets.
(1 - csc^2 x) / (1 + csc x) = (sin x - 1) / sin x
Is it correct?
Here is a trig question I need help solving (step by step walk-through would be the most beneficial)
Our teacher prefers that we only work on one side.
1 - csc^2 x / 1 + csc x = sin x - 1 / sin x