Evaluating The Integrator: 1/(x^2+a^2)(x^2+y^2+a^2)^(1/2)

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SUMMARY

The discussion focuses on evaluating the integral of the function 1/((x² + a²)(x² + y² + a²)^(1/2)). The user references The Integrator tool from Wolfram Alpha for evaluation and proposes a substitution method involving hyperbolic functions. Specifically, they define k² as y² + a² and use the substitution x = kSinh(u) to transform the integral into a more manageable form. The proposed integral simplifies to ∫(k du)/(a² + k² Sinh²(u)), indicating a clear path for further evaluation.

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Well..perhaps along these lines:
[tex]k^{2}\equiv{y}^{2}+a^{2}, x=kSinh(u)\to\sqrt{x^{2}+y^{2}+a^{2}}=k\Cosh(u), dx=kCosh(u)du[/tex], whereby our integral should roughly be something like:
[tex]\int\frac{kdu}{a^2+k^{2}Sinh^{2}(u)}[/tex]
Maybe.
 
bump :wink:
 

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