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Math Help - Double integration

  1. #1
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    Double integration

    Need help to show that double integrate [1 0] [1 0] 1/(1-xy) dx dy gives pi^2 / 6 by applying the substitution:

    x = (sqrt2 sin theta - v) / sqrt2
    y = (sqrt2 sin theta + v) / sqrt2
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  2. #2
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    Re: Double integration

    Hey TaTzRE66.

    Can you show us what you tried? What is the Jacobian, new limits and new integral used for the substitution?
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