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How to prove

$$\frac{\sin^2(x)}{1+\cos(2x)} = \frac1{2} \tan^2(x)$$

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    please do not ask question in imperative mode.2011-04-20
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    I have downvoted, so I feel obligated to explain my motives. 1) You have not shown your work, nor indicated that you tried to solve it. 2) Question is asked in imperative mode. 3) Question is ambiguously formatted. 4) By showing no work or interest (except for an answer) at question of this level, I think it is on verge of being too localized. If you address the above points, I would be more than glad to retract my downvote.2011-04-20

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