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  1. #1
    Keko0
    Guest

    Help a math noob!

    I have a math evaluation in two days and this is getting me nuts T_T

    Explain what this means:

    f(x) = A Cos [B ( X - C ) ] + D

    g(x) = A Sin [B ( X - C ) ] +D

    I know there are 2 others just that they are negative.

    for example:

    If it starts at its maximum value, g = cos.

    If it starts at its minimum value, g = -cos.

    If it starts at its baseline value and goes up, g = sin.

    If it starts at its baseline value and goes down, g = -sin.

    Now i know that A is the amplitude which you can find it : Max-Min / 2

    To find the horizontal axis or baseline is also easy : Max+Min / 2

    Now the rest is something i dont understand.. wtf is B, C, and D?

    I'll appreciate any help XD
    8)

  2. #2
    i'm awesome.
    Join Date
    May 2005
    Posts
    9,581
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    Phase Shift!

  3. #3

    B modifies the frequency.
    C shifts the phase.
    D changes the baseline.

    Get a graphing calculator and fiddle around with the equation to see exactly what they all do.

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