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    MCRFlyleaf6's Avatar
    MCRFlyleaf6 Posts: 6, Reputation: 1
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    #1

    Dec 2, 2008, 01:41 PM
    Sine sum and difference formula
    I can't seem to get started with this one,

    Sin (21TT / 12)
    vejrm01's Avatar
    vejrm01 Posts: 3, Reputation: 1
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    #2

    Dec 5, 2008, 07:22 PM

    Do you have the definition of the sum/difference formula for sine? You need to break down the 21 pi/12 into radians that you know the answer to, such as sin(pi/3) or sin(pi/6).

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