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Math Help - Help with integration problem, by parts, please look

  1. #1
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    Help with integration problem, by parts, please look

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    Im confused where the - sign in du = -sinxdx disappears to? since it is uv-(int)vdu ?
    Also once that problem is resolved how do they get to 1/2..... for the answer?

    Thanks very much!
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  2. #2
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    Re: Help with integration problem, by parts, please look

    see the link ...

    Integration by parts
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