SOLUTION: prove using the t = tan (x/2) [tan 2x + cotx] / [tan2x - tanx] - cot^2 x

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Question 1142135: prove using the t = tan (x/2)
[tan 2x + cotx] / [tan2x - tanx] - cot^2 x
Answer by ikleyn(52800) About Me  (Show Source):
You can put this solution on YOUR website!
.

Prove  WHAT ?


        As this post is presented,  it makes no sense.


                It does not say  WHAT to prove.