Gerd Posted May 29, 2005 Report Share Posted May 29, 2005 Hello, To calculate the dynamic frequency response in filter theory I need the solution or a substitution for the following Integral: Integrate[Log[Cos[ax/(1+a^2x^2)–ArcTan[ax]]],x] I could not find any. You will get 10% of my Nobel Prize if I get one for the correct solution :naughty: Gerd+ Quote Link to comment Share on other sites More sharing options...
C1ay Posted May 29, 2005 Report Share Posted May 29, 2005 Have you tried the Integrator? It's a web interface to Mathematica. Quote Link to comment Share on other sites More sharing options...
Gerd Posted May 31, 2005 Author Report Share Posted May 31, 2005 Hello!I get the input as output from Mathematica. That means it cannot find a solution.Gerd+ Quote Link to comment Share on other sites More sharing options...
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