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Math Help - integrating problem

  1. #1
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    integrating problem

    The problem is
    integral of sin(x)/(1+x^2) from -1 to 1
    I have tried integration by parts and substitution but it never seems to get any simpler. Any help would be appreciated.

    Thanks
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  2. #2
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    note that \frac{\sin{x}}{1+x^2} is an odd function.

    so ... \int_{-1}^1 \frac{\sin{x}}{1+x^2} \, dx = \, ?
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  3. #3
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    Thumbs up

    the integral of an odd function from -a to a is 0

    ::smacks head against wall::
    wow, that was really simple.

    thanks for the help though.
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