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Homework Help: Simplify Complex Number Fraction

  1. Sep 12, 2009 #1
    1. The problem statement, all variables and given/known data

    [tex]\frac{(cos60 - isin60)^5 * (cos45 - isin45)^3}{(cos15-isin15)^7}[/tex]

    2. Relevant equations

    3. The attempt at a solution

    I have had several tries so far, but simply do not know what to do. Would somebody be so kind and simplify this expression step by step. I couldn't find any solved problems like this on the internet and am lost!

  2. jcsd
  3. Sep 12, 2009 #2
    e-ix=cosx - isinx
    to simplify everything into base e, then use laws of exponents, and you should be able to come to an answer.
    Last edited: Sep 12, 2009
  4. Sep 12, 2009 #3
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