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Re: Simplifying Log to ArcCos Expressions
"David Park" wrote >Dear MathGroup, > >I want to integrate the following expression and get a simple answer. > >expr1 = (k/r^2)*(1/Sqrt[1 - k^2/r^2]) > >The answer is actually quite simple: ArcCos[k/r] + constant. But what a lot of work for me to get it! Perhaps someone can show a simpler path. If I'm not mistaken, this is easily done by substitution. http://www.math.hmc.edu/calculus/tutorials/trig_substitution/ Simplification should be done before calling Integrate, then. cheers, Peltio Sometimes, the best way to use Mathematica is to not use it at all. : ] -- Invalid address in reply-to. Crafty deminging required to mail me.