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Math Help - Trigometric Integral

  1. #1
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    Trigometric Integral

    Evaluate the Integral
    ∫ 1/[(x^2) * sqrt(x^2 + 4)] dx
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  2. #2
    Senior Member Peritus's Avatar
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    no trigonometry needed, use the following substitution:

    u = \frac{x}<br />
{{\sqrt {x^2  + 4} }}
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  3. #3
    Junior Member
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    Quote Originally Posted by thegush1 View Post
    Evaluate the Integral
    ∫ 1/[(x^2) * sqrt(x^2 + 4)] dx

    you could try x =2tan(u)

    try the following page for more explanation

    integration by trigonometric substitution
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  4. #4
    Super Member
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    x = \frac{1}{u} works out nicely.
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