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Homework Help: Summing cosines of sines and cosines

  1. Jun 11, 2012 #1
    1. The problem statement, all variables and given/known data

    [tex]\sum_{t=0}^{n-1}cos2 \pi ft(x_{t}- \mu-Acos2 \pi ft-Bsin2 \pi ft)[/tex]

    2. Relevant equations

    3. The attempt at a solution
    I know to set = 0
    I just am not knowing what to do with the cos after the sum...how do I take this sum?
  2. jcsd
  3. Jun 12, 2012 #2


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    hi matlabber! :smile:

    i suspect they mean [itex]\sum_{t=0}^{n-1}(cos2 \pi ft)(x_{t}- \mu-Acos2 \pi ft-Bsin2 \pi ft)[/itex] :wink:
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