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Math Help - question about integral

  1. #1
    Newbie micheymichmich's Avatar
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    question about integral

    how do i do: \int sqrt{x^2-1}\;dx
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by micheymichmich View Post
    how do i do: \int sqrt{x^2-1}\;dx
    I suppose you mean \int \sqrt{x^2 - 1}~dx

    we can use trigonometric substitution here. try x = \sec \theta

    can you continue?
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  3. #3
    Newbie micheymichmich's Avatar
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    Quote Originally Posted by Jhevon View Post
    I suppose you mean \int \sqrt{x^2 - 1}~dx

    we can use trigonometric substitution here. try x = \sec \theta

    can you continue?
    yes. thank you
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