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Math Help - Definite integral help please!

  1. #1
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    Definite integral help please!

    Can somebody help me in telling me how to solve the following integral?

    \int\limits_0^a  \frac{1}{(x^2+z^2)^\frac{3}{2}}dx

    I'm quite at a loss...
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  2. #2
    MHF Contributor Calculus26's Avatar
    Joined
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    Use the trig sub:

    Let x = ztan(t)

    dx = z sec^2(t)dt

    You'll get a simple integral of cos(t)
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