SOLUTION: Prove or disprove without a calculator. (sin theta/csc 2theta)-(cos 2theta/sec theta)= -cos 3theta

Question 139752: Prove or disprove without a calculator.
(sin theta/csc 2theta)-(cos 2theta/sec theta)= -cos 3theta
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
I'm presuming that you mean rather than , because the second one is a horror I have no intention of spending the rest of the afternoon solving.

(read is identical to), so and

So:
, except where
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