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Re: Real and Imaginary Parts of complex functions

• To: mathgroup at smc.vnet.net
• Subject: [mg129941] Re: Real and Imaginary Parts of complex functions
• From: Daniel <dosadchy at its.jnj.com>
• Date: Wed, 27 Feb 2013 03:06:58 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• Delivered-to: l-mathgroup@wolfram.com
• Delivered-to: mathgroup-newout@smc.vnet.net
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Use ComplexExpand

In[]:= ComplexExpand[Re[x + y I]]
Out[]= x

In[]:= ComplexExpand[Re[1/(x + y I)]]
Out[]= x/(x^2 + y^2)