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Simple question: Use Euler's formula to rewrite an expression

  1. Feb 24, 2009 #1
    1. The problem statement, all variables and given/known data
    Use Euler's formula to write the given expression in the form a + ib:

    e^(2-(pi/2)i)


    2. Relevant equations
    Euler's formula: e^(it) = cos(t) + i*sin(t)


    3. The attempt at a solution
    I'm not sure how to get started on this one... am I supposed to get the expression in to the e^(it) form somehow first?
     
  2. jcsd
  3. Feb 24, 2009 #2

    Dick

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    Science Advisor
    Homework Helper

    Use the laws of exponentials to split it into e^2*e^(-i*pi/2) first. Now use Euler's formula on the second factor. The first one you know well.
     
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