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Math Help - Question regarding integral

  1. #1
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    Question regarding integral

    Hello! I am having problems with regards to finding an integral.

    The question is find the integral of sqrt(1-x^2)
    i know that u substitution can be used and that sqrt(1-x^2)du=dx but after i substitute this I don't understand how it transitions from being integral of (1-x^2) to (1-sin^2u)du, like where does that come from. Any help would be greatly appreciated.
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  2. #2
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    Quote Originally Posted by Solid8Snake View Post
    Hello! I am having problems with regards to finding an integral.

    The question is find the integral of sqrt(1-x^2)
    i know that u substitution can be used and that sqrt(1-x^2)du=dx but after i substitute this I don't understand how it transitions from being integral of (1-x^2) to (1-sin^2u)du, like where does that come from. Any help would be greatly appreciated.
    integrate Sqrt[1-x^2] - Wolfram|Alpha (Click on show steps).
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