# Math Help - Verifying Identities

1. ## Verifying Identities

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.

2. Write $\tan(x)$ and $\sec^2(x)$ in terms of $\sin(x) \text{ and } \cos(x)$