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Math Help - Function help.

  1. #1
    Sep 2009

    Function help.

    Hello guys.

    I'm really not sure what to do with this, since I'm not quite familiar with using pi or the sin,cos,tan in equations. Especially the sin,cos,tan.

    Find: f(\frac{\pi}{6})

    If f(x) = \frac{-5\cos(9x)}{2\sin(-x)}

    A few steps on how to do this with explanation would be greatly appreciated thanks in advance!
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  2. #2
    Sep 2009
    well, if you're good with degrees its fine, because pi=180 degrees. from there you can probably do it easily, either by plugging it into a calculator, or using exact trigonometric values.


    Moderator editor: pi/6 radians = 30 degrees.
    Last edited by mr fantastic; October 1st 2009 at 11:01 PM. Reason: Merged posts
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