Trig Identies - One Question Please Help!

[jwmhelp]

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

[Martingale]

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

Use the fact that



then simplify.