Derivative of Sine

Apr 2009
16
0
Hey,

how would you differentiate y=xsinx

I got xcosx
but that's wrong.
 
Dec 2009
3,120
1,342
Hey,

how would you differentiate y=xsinx

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

\(\displaystyle xsinx\) is a product, hence you need to use the product rule of differentiation.

\(\displaystyle \frac{d}{dx}xsinx=x\frac{d}{dx}sinx+sinx\frac{d}{dx}x\)
 
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