Question

How can I differentiate xsin4x ?

Answer 1

Here is your answer `1.sin4x + 4.x.cos4x`

Explanation:

Using Product Rule

`f(x).g(x) = f(x)'.g(x) + f(x).g(x)'`

And Chain Rule

We can write question like this
`=>x . sin4x`

`=> 1 . sin4x + x . cos4x . 4`