# Integration

• November 15th 2006, 11:58 AM
changing_seasons
Integration
Hello everyone, first post here. I just need some help on this integral. I can't seem to get it right, any help is appreciated. I don't even need a full solution, just give me some hints. Thanks.

http://i67.photobucket.com/albums/h316/motsjo/MS6P.gif
• November 15th 2006, 12:56 PM
ThePerfectHacker
Quote:

Originally Posted by changing_seasons
Hello everyone, first post here. I just need some help on this integral. I can't seem to get it right, any help is appreciated. I don't even need a full solution, just give me some hints. Thanks.

http://i67.photobucket.com/albums/h316/motsjo/MS6P.gif

$a\not = 0$
First open the parantheses.
$\int
x\sqrt{1-\frac{x^2}{a^2}}dx$

Use substitution function,
$u=\frac{x^2}{a^2}$
The rest is trivial.
• November 15th 2006, 01:27 PM
changing_seasons
Oh yeah, I got it now. Thanks.