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Math Help - Amplitude of a sin graph?

  1. #1
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    Amplitude of a sin graph?

    Hi,
    I just wanted to double check something really quick:
    When finding the amplitude of a sin graph (I was just given a graph, no equation) you take the y-value of the maximum subtract it from the y-value of the minimum and divide it all by 2, right?

    Or was it the x-value?

    Thanks!
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  2. #2
    Moo
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    Hello,
    Quote Originally Posted by overduex View Post
    Hi,
    I just wanted to double check something really quick:
    When finding the amplitude of a sin graph (I was just given a graph, no equation) you take the y-value of the maximum subtract it from the y-value of the minimum and divide it all by 2, right?

    Or was it the x-value?

    Thanks!
    It's the y value.
    You take the absolute value of the difference between the max and the min. And then divide by 2.


    It doesn't make sense if you do it for the x-value. What would be useful with the x-value is the period.

    (google for "amplitude and period" ^^)
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