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Math Help - Integral problem-

  1. #1
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    Integral problem-

    I saw a guys signature with this integral-

    Intgral of cos(x)/(1+x^2)^2

    find it from infinity to negative infinity =]

    the answer was pi/e im curious on finding the indefinte integral xD
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  2. #2
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    Quote Originally Posted by Khonics89 View Post
    I saw a guys signature with this integral-

    Intgral of cos(x)/(1+x^2)^2

    find it from infinity to negative infinity =]

    the answer was pi/e im curious on finding the indefinte integral xD
    The indefinite integral cannot be found using a finite number of elementary functions. This might seem strange to you since obviously the quoted definite integral can be found. Even then, the quoted integral is an example of only a small set of definite integrals for this integrand whose exact value can be found.
    Last edited by mr fantastic; May 25th 2009 at 01:53 AM. Reason: Updated the quote with new username of OP
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