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Homework Help: Calculating time period of cos(pi/8 n*n)

  1. Sep 15, 2012 #1
    can some one please help me calculate the time period of the signal cos(pi/8 n*n).
  2. jcsd
  3. Sep 16, 2012 #2
    actually what really confuses me is the term n square..i hav solved similar questions where cos was a function of n(t in continous time).

    please help me with this question..
    i will be really greatful
  4. Sep 16, 2012 #3
    It seems like that this function is not periodic. Enter this in wolfram alpha, check out the graph.
  5. Sep 16, 2012 #4

    rude man

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    Gold Member

    Write out the first dozen or so terms, then the periodicity will become apparent.
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