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help with integration

  • To: mathgroup at
  • Subject: [mg121632] help with integration
  • From: Salman Durrani <dsalman96 at>
  • Date: Fri, 23 Sep 2011 03:43:15 -0400 (EDT)
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I am trying to do the following integration:

Integrate[r^2*ArcCos[x/r] - x*Sqrt[r^2 - x^2], {x, Sqrt[3] y, Sqrt[r^2 - y^2]} ]

When I try, Mathematica comes back to be with a very long conditional expression.

How do I tell mathematica that r is positive, real in the above equation not complex.



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