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How do I integrate

  1. Apr 30, 2010 #1
    What method would I use to integrate cos(x)/1+sin^2(x)dx? I was thinking by parts but it isn't working for me.
  2. jcsd
  3. Apr 30, 2010 #2
    Try a u substitution.
  4. Apr 30, 2010 #3
    Try a substitution. Notice that cos(x) is the derivative of sin(x).
  5. Apr 30, 2010 #4
    Wouldn't the derivative of sin^2(x) be 2sin(x)cos(x)? I think I'm still a little lost.
  6. Apr 30, 2010 #5
    Try getting it into this format

    [tex] \int \frac{du}{1+u^2}[/tex]
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