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Finding the period

  1. May 3, 2009 #1
    How do I find the period of this function?
    g(t) = cos (4t) + sin (t)
  2. jcsd
  3. May 3, 2009 #2


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    Gold Member

    Graph it and check? Or would you rather do it by analysis.
  4. May 4, 2009 #3
    i need to do it without graphing
  5. May 4, 2009 #4


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    Science Advisor

    sin t is periodic with fundamental period [itex]2\pi[/itex] and cos 4t is periodic with fundamental period [itex]\pi/2[/itex]. Since [itex]2\pi= 4(\pi/2)[/itex], [itex]2\pi[/itex] is also a period of cos 4t.
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