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How do you find this integral?

  1. Jun 27, 2011 #1

    asap9993

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    1. The problem statement, all variables and given/known data
    the problem is

    Find the antiderivative of 1/(1 + cos(x))

    2. Relevant equations



    3. The attempt at a solution

    I think it requires a trick, but I can't figure it out.
     
    Last edited: Jun 27, 2011
    asap9993, Jun 27, 2011
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  3. Jun 27, 2011 #2

    lanedance

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    is it a definite integral?
     
    lanedance, Jun 27, 2011
  4. Jun 27, 2011 #3

    ehild

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    Gold Member

    Use the relation between cos(x/2)and cos(x).

    ehild
     
    ehild, Jun 27, 2011
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