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Integrate yields complex results

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  • Subject: [mg127969] Integrate yields complex results
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  • Date: Thu, 6 Sep 2012 04:13:54 -0400 (EDT)
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Hi, using Mathematica 8.0 I computed this expression:

Integrate[((1 + y^2) (1 + x^2 + y^2)^(1/2))^(-1), y]

obtaining ugly complex Logarithms which cannot be simplified even with ExpToTrig. The correct real result is given by Mathematica 5.2 and is


How is possible to obtain this result with 8.0 version.
I even tried to calculate Real and Imaginary part, but 8.0 refuses to do that. Please help me. I need to use Mathematica for research.

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