1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Integral of Cos^2(x)

  1. Jul 13, 2009 #1
    Could someone walk me through this one? I know what the answer is, but don't really see how that answer is come by. In the book, it just states the answer, so I guess its something obvious, but the answer still eludes me :(


    2. Relevant equations
    [tex] \int{Cos^2{(ax)}}dx[/tex]
     
  2. jcsd
  3. Jul 13, 2009 #2

    Cyosis

    User Avatar
    Homework Helper

    Make sure you know your trig identities.

    [tex]
    \cos 2x=2 \cos^2x-1
    [/tex]
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Integral of Cos^2(x)
  1. Integral (cos x)^2? (Replies: 2)

  2. Cos^2(x) Integral (Replies: 5)

  3. Integral of cos^2 x (Replies: 3)

  4. Integral of cos(x^2) (Replies: 6)

Loading...