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Math Help - help finding "u" in a integral

  1. #1
    Junior Member
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    help finding "u" in a integral

    Hi, im working on a definite itegral using subsitution but i cant figure out what term i should subsitute?

    Here it is: integral goes from 0 to pi 5xcos(x^2) dx

    thank you
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  2. #2
    Super Member PaulRS's Avatar
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    Use u=x^2
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  3. #3
    Junior Member
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    Thank you! it worked perfect
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