1. ## Cosh Integral Help

I've been trying to figure out the integral of xcosh(x^2) for about an hour now and am having no luck; I believe I have to use integration by parts but I'm finding it very confusing. All help is appreciated.

2. Sub

u=x^2

$u=x^2 \ \ \ \ du=2xdx$

$\displaystyle\frac{1}{2}\int\cosh{u}du$