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Thread: HELP ME FIND A PERIOD FOR THIS GRAPH

  1. #1
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    Exclamation HELP ME FIND A PERIOD FOR THIS GRAPH

    y=sin(2x)-cos(0.4x)
    and give me an explanation so i would understand it too.
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  2. #2
    MHF Contributor
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    The period of the sin(2x) function is $\displaystyle \pi$ and the period of the cos(0.4x) function is $\displaystyle 5\pi$ so when combined the period of the composite function is $\displaystyle 5\pi$.
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