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Math Help - Calculus - Integration

  1. #1
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    Calculus - Integration

    When you integrate 2sin xcos x /1-2 (cosx)^2is the answer - (sec2x)^2/2?

    If not, then what would be the proper approach?
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  2. #2
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    What about substituting u=1-2cos^{2}(x) and trying to answer your question by yourself?
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  3. #3
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    I get 1/2ln(1-2cos^2x)+c. Is that right?
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  4. #4
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    Quote Originally Posted by bhuang View Post
    I get 1/2ln(1-2cos^2x)+c. Is that right?
    Does it work when you differentiate it?
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