Question

Solve : $\frac{d}{dx}\left(sin3x\right)=?$

Answer 1

Consider the given expression,

$\Rightarrow \frac{d}{dx}.\sin 3x$

$\Rightarrow \cos 3x\frac{d}{dx}3x$

$\Rightarrow 3.\cos 3x$

Hence, this is the answer.