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Math Help - integral

  1. #1
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    integral

    I need help with this integral

    integral of arctan of the square root of (1-x) in dx

    thanks for your help
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by 0123 View Post
    I need help with this integral

    integral of arctan of the square root of (1-x) in dx

    thanks for your help
    put u=sqrt(1-x),

    then dx=-2u du, and the integral becomes:

    int -2u atan(u) du,

    which in my book is a standard integral.

    RonL
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  3. #3
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    It is not on my book..I made the same substitution and tried to go on by parts considering u as the derivative of u^2/2 but then I got stuck on the integral u^2/(1+u^2) in du. Can you tell me the standard integral so that the solution might help me see how I can go on? Thanks
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