SOLUTION: Use double-angle or half-angle identity to simplify {{{ (2-csc^2(x))/(csc^2(x)) }}} Thanks

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Question 1101594: Use double-angle or half-angle identity to simplify
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Thanks
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
This is 2/csc^2 x)-1
That is 2 sin2^x-1
That is -(1-2 sin^2 x)
that is -cos (2x) ANSWER
check
let x=30 degrees
csc 30 is 2
(2-4)/4=-1/2
-cos (60)=-1/2