Question

simplify cosx tanx

Answer 1

\(\mathbf{tanx = \Large \frac{sinx}{cosx}}\) so....it wil become:

\(\Large \mathbf{(cosx)(\frac{sinx}{cosx})}\)

can you see it now? :DDD

Answer 2

Express the tan function as defined, and it becomes pretty obvious.\[\cos(x) \tan(x)=\cos(x) \frac{\sin(x)}{\cos(x) }=\sin(x)\]