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Homework Help: Write answer in both rectangular from and polar Q in degre

  1. Apr 23, 2010 #1
    Hi

    I want check my answer

    4 - write answer in both rectangular from and polar Q in degre

    a ) (1 + i ) ( 2+ 2i )
    b ) -2 + 2i
     

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  3. Apr 23, 2010 #2
    In part (a), you seem to have assumed that (2i)2=4i, which is wrong....(2i)2=-4.

    In part (b) you have written: tan-1(2/2), where it should be: tan-1(2/-2). Also I don't understand why you have written: 45-[tex]\pi[/tex]/4.
     
  4. Apr 23, 2010 #3
    Which level are you at? College? I will like to know that before I help you
     
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