N nikchic5 Junior Member Joined Feb 16, 2006 Messages 106 Jun 13, 2007 #1 Can someone please help me do this? Thanks so much! The integral of cos^5 x dx Thanks so much for any help!!
Can someone please help me do this? Thanks so much! The integral of cos^5 x dx Thanks so much for any help!!
M morson Full Member Joined Apr 12, 2007 Messages 263 Jun 13, 2007 #2 \(\displaystyle \L\ = \int cos(x) cos^4(x) \ dx = \int cos(x) (1 - sin^2(x))^2 \ dx\) Now put \(\displaystyle u = sin(x)\) and see where it takes you.
\(\displaystyle \L\ = \int cos(x) cos^4(x) \ dx = \int cos(x) (1 - sin^2(x))^2 \ dx\) Now put \(\displaystyle u = sin(x)\) and see where it takes you.
