TargetFunctions - Wolfram Mathematica 7 Documentation

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Built-in Mathematica Symbol

TargetFunctions
is an option for functions such as ComplexExpand that specifies what functions to attempt to generate in the output.

This gives an answer in terms of Re[z] and Im[z]:

With TargetFunctions->{Abs, Arg}, the answer is given in terms of Abs[z] and Arg[z]:

Use Conjugate as a target function:

This gives an answer in terms of Re[z] and Im[z]:

With TargetFunctions->{Abs, Arg}, the answer is given in terms of Abs[z] and Arg[z]:

Use Conjugate as a target function: