# Calc help!

1. Apr 25, 2010

### sportlover36

how can i find a power series for this integral? $$\int cos(x^3)$$

2. Apr 25, 2010

### tiny-tim

Hi sportlover36!

(have an integral: ∫ and a sigma: ∑ and try using the X2 tag just above the Reply box )

Just write out the series for cosx, and then write x3 everywhere instead of x.