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Math Help - Sinusoidal equations.

  1. #1
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    Sinusoidal equations.

    I need help with this worksheet. Click link and go to exploration 3-6b :
    http://www.ihs.issaquah.wednet.edu/T...alc_EXP_03.pdf

    I mainly need help with #2. and on. Thanks!
    Last edited by mr fantastic; May 12th 2011 at 08:07 PM. Reason: Deleted begging for help from title.
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  2. #2
    Forum Admin topsquark's Avatar
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    Thread re-opened.

    -Dan
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  3. #3
    Member rtblue's Avatar
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    The question is essentially asking what is the equation of a cosine graph with a period of 12 degrees.

    The general form of a cosine graph is as follows:

    y=Acos(Bx+C)+D

    The formula for the period is (360/B) or (2pi/B), the former for degrees, the latter for radians.

    So we have 360/B=12

    B=30, and I believe this is the horizontal dilation factor.

    So we have: f(x)=cos(30x)

    P.S. My latex keeps on saying: "LaTeX ERROR: Unknown error", so I couldn't use latex for any of the math. Any ideas as to why this is happening?
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