Posted by **Erica** on Tuesday, October 18, 2011 at 9:02pm.

First make an appropriate substitution and then use integration by parts to evaluate the indefinite integrals:

∫ sinx cos³x e^(1-sin²x) dx

I was going to substitute u= 1 - sin²x, but then i got du = ½ sinxcosx - ½ xdx, so im stuck.

Thank you so much!!

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