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Real and imaginary parts of an expression

  1. Feb 5, 2010 #1
    can anyone tell me how to get the real and imaginary parts of the following function :

    (x+ i y)* Log( a+i b) where x, y a and b are all real numbers and i =sqrt (-1).

    Thanks very much
     
  2. jcsd
  3. Feb 5, 2010 #2

    nicksauce

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    Recall that Log(z) = ln|z| + iArg(z). When you write it like that, it is easy to separate the expression into real and imaginary parts.
     
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