Verifying that 2tanx/1+tan^2x = sin2x x represents theta. I have simplified it down to 2tanx/sec^2x. Should i simplify sec^2x even further? Any help would be appreciated.
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Write $\displaystyle \tan(x)$ and $\displaystyle \sec^2(x)$ in terms of $\displaystyle \sin(x) \text{ and } \cos(x)$
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