First make a substitution and then using IBP to evaluate the integral -3sin(x^1/2). I was going to use x^(1/2) as U and let du= 2/3x^(3/2) dx. I'm not sure how to incorporate u-sub. with IBP though.

Question

anonymous · Answer

What is the integral you are trying to solve?

anonymous · Answer

$$-3 \int\limits \sin(x^{1/2})dx?$$

anonymous · Answer

The substitution isn't as straight-forward as you may be used to.
$$-3\int\sin\sqrt x~dx$$
Let $\sqrt x=u$, so that $x=u^2$. This gives you $dx=2u~du$.
$$-3\int\sin u~(2u~du)\
-6\int u\sin u~du$$

tiffany_rhodes · Answer

Thank you! I'll see where I get from here.

anonymous · Answer

You're welcome