# Math Help - Derivative of Sine

1. ## Derivative of Sine

Hey,

how would you differentiate y=xsinx

I got xcosx
but that's wrong.

2. Originally Posted by p4pri
Hey,

how would you differentiate y=xsinx

I got xcosx
but that's wrong.
Hi p4pri,

$xsinx$ is a product, hence you need to use the product rule of differentiation.

$\frac{d}{dx}xsinx=x\frac{d}{dx}sinx+sinx\frac{d}{d x}x$