- #1

nickclarson

- 32

- 0

**[Solved] Some very tough integration problems I am stuck on.**

Got these for homework the other day and they are due today! I am having trouble on where to start with all of them.

[tex]\int x^{n}lnx dx[/tex]

[tex]\int sin(\sqrt{x}) dx[/tex]

don't even know where to start on this one... should I substitute for sqrt(x)?

[tex]\int xarctan(x^{2}-1) dx[/tex]

I think I should substitute for what's inside arctan, but then I'm left with [tex]\frac{1}{2} \int arctan(u) dx[/tex] and I don't know how to integrate arctan

Last edited: