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Math Help - Exact Solution of the Equation

  1. #1
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    Exact Solution of the Equation

    4 arccos{x-pi}=2 arccos{x}

    Thank you,
    Jason
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  2. #2
    MHF Contributor
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    Talking

    I'd start by dividing through by 2. Then take the cosine of either side, and apply the double-angle identity for cosines to the left-hand side.
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