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Thread: A typical integral

  1. #1
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    A typical integral

    Dears,

    First of all, I am sorry for the unbalance format since I am not get used to typing mathematics symbolsin La Tex

    More than twenty years ago, I was accidentally handed an integral. At the first glance, it was not a big problem. However I failed to solved it until now. Sometimes I return to it after a hard working day as a hobby. The more I think about it, the more I discover that it is not simple. It is



    I thought about the Euler formula in complex number
    Exp(ix) = cosx + isinx
    Then let say



    Io = = + i

    I tried to calculate to find out result for Io, then acquire its imaginary part. But it does not solve the problem either.
    Any of you have good idea or solution can post it here to help me

    If you find it difficult to read, please see the attached screenshot with the same content in Facebook

    https://www.facebook.com/photo.php?f...type=3&theater


    Thanks
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  2. #2
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    Re: A typical integral

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  3. #3
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    Re: A typical integral

    Can we find the result for indefinite integral, without the bounding?
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  4. #4
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    Re: A typical integral

    Quote Originally Posted by thinhnghiem123 View Post
    Can we find the result for indefinite integral, without the bounding?
    https://en.wikipedia.org/wiki/Trigonometric_integral
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