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Homework Help: Caculus Help : Integrating with trig identities?

  1. Sep 4, 2010 #1
    1. The problem statement, all variables and given/known data

    integrate: sin (2x)/(1+sinx)



    2. Relevant equations

    (sin x)^2 + (cos x) ^2 = 1
    sin (2x) = 2 sin x cos x
    cos (2x) = (cos x)^2 - (sin x)^2



    3. The attempt at a solution

    I've been trying to integrate this thing for about an hour by rearranging various trig idenities with no luck. Am I missing something? I don't think this problem is supposed to be that hard. Someone please help!
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 4, 2010 #2
    I would try first replacing sin (2x) with 2 sin x cos x then do u sub and let u = cos x. Try that and see if it helps
     
  4. Sep 4, 2010 #3
    I got it now, Thanks for your help.
     
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