Answer
$cos(\theta)\tan(\theta)=\sin(\theta)$
Work Step by Step
$\tan(\theta)$ = $\frac{\sin(\theta)}{\cos(\theta)}$
This can be substituted into the equation:
$cos(\theta)\tan(\theta)=\cos(\theta)\frac{\sin(\theta)}{\cos(\theta)}=\sin(\theta)$
Therefore,
$cos(\theta)\tan(\theta)=\sin(\theta)$
