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Math Help - Integral of Function * sin / cos

  1. #1
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    Integral of Function * sin / cos

    In your guys opinion, what is the best way to compute that kind of integral?



    or



    That integrals apperars when we´re calculating the coefficients of Fourier Series, and i guess there´s a "general" way to solve them.. Can someone help me?

    Thanks!


    [Im new here at this forum, im using FF3.0.9+GreaseMonkey+TexTheWorld to write in TeX here.]
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  2. #2
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    Quote Originally Posted by Tchelobh View Post
    In your guys opinion, what is the best way to compute that kind of integral?



    or



    That integrals apperars when we´re calculating the coefficients of Fourier Series, and i guess there´s a "general" way to solve them.. Can someone help me?

    Thanks!


    [Im new here at this forum, im using FF3.0.9+GreaseMonkey+TexTheWorld to write in TeX here.]
    Usually you need to use integration by part.
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  3. #3
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    Repeated Post =)
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  4. #4
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    Hmm.. What im doing wrong?

    let

    So, we have

    let ,so

    and , so

    So, computing , we got




    Again, let , so


    Computing again , then inserting the result in the above integral is the smartest way to calculate I ? =\

    Am i doing something wrong?

    Thanks
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