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Homework Help: Show the real part is zero

  1. Apr 10, 2009 #1
    1. The problem statement, all variables and given/known data
    (z+1)^100=(z-1)^100 z is complex


    2. Relevant equations



    3. The attempt at a solution

    (z-1)/(z+1)=e^(i2pi(k/100))
     
  2. jcsd
  3. Apr 10, 2009 #2

    rock.freak667

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    Homework Helper

    Now use exp(ix)=cosx+isinx and multiply by the complex conjugate of the denominator.
     
  4. Apr 10, 2009 #3
    Word. I think I was just tired. I feel dumb for not seeing that.
     
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