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Math Help - Integral

  1. #1
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    Integral

    i need help with these integrals
    1. integral from 0 to infinity e^(-ax) cosbx dx
    2. integral from 0 to 1 1/sqrt(x(1-x^2))
    thanks
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  2. #2
    Newbie Esteban's Avatar
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    Re: Integral

    I'm not sure, beacause I didn't did it, but I have an idea for the second. Let \sqrt{x}=u then you will obtain $\displaystyle \int \dfrac{1}{\sqrt{1-u^4}} du$ then by parts will be easy but rather long
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  3. #3
    MHF Contributor

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    Re: Integral

    For the first, use integration by parts twice.
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