# Calc III help requested

1. Dec 4, 2004

### falcon0311

From what I can remember, this wasn't covered in my class, however it was a bonus question on a test, and I was wondering if someone could take the time to enlighten me on this one.

Find $$\frac{\delta f }{ \delta x}$$ and $$\frac{\delta f }{ \delta y}$$ when

$$f(x,y) = \int _x ^{x^3y} \sin (t^2) dt$$

2. Dec 4, 2004

### Tide

This may help:

$$\frac {d}{dx} \int^x f(x') dx' = f(x)$$