1. ## derive identity help

$
\frac{\cos\theta\tan\theta + \sin\theta}{\tan\theta} = 2\cos\theta
$

help deriving this identity. thank you

2. Originally Posted by jvignacio
$
\frac{\cos\theta\tan\theta + \sin\theta}{\tan\theta} = 2\cos\theta
$

help deriving this identity. thank you
Note that $\cos\vartheta\tan\vartheta=\sin\vartheta$ and $\tan\vartheta=\frac{\sin\vartheta}{\cos\vartheta}$

Can you try and see if you can establish this identity?

--Chris

3. Originally Posted by Chris L T521
Note that $\cos\vartheta\tan\vartheta=\sin\vartheta$ and $\tan\vartheta=\frac{\sin\vartheta}{\cos\vartheta}$

Can you try and see if you can establish this identity?

--Chris
no im not very familiar with identities

4. Those are basic ones, better you review some of trig.