Does AbsArg work for generic expressions?

[luisclaudiomat (Luis Claudio LA)]

Hi… I want get Abs[z] and Arg[z] and I’m using the AbsArg[] command but, it works for ‘numeric’ complex… For generic expression, I’ve trouble. Can someone help me?

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[gianlucagorni]

It takes some nudging:

FullSimplify[ComplexExpand[AbsArg[1/(I w - 2)^2],
  TargetFunctions -> {Re, Im}],
 Element[w, Reals]]

Arg is not easy to deal with symbolically, because of the discontinuities.

[luisclaudiomat (Luis Claudio LA)]

Thanks…