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Math Help - Function help.

  1. #1
    Newbie
    Joined
    Sep 2009
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    10

    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
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    Joined
    Sep 2009
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    Scotland
    Posts
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    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.

    (-5cos(9*30))/2sin(30)


    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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