(sin(x)tan(x))/(cos(x))

Answer 1

You haven't actually asked a question, so I assume you want the expression simplified. Remember that:

$tan(x)=\frac{sin(x)}{cos(x)}$

So:

$\frac{sin(x)tan(x)}{cos(x)}=tan(x)tan(x)=ta{n}^2(x)$