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Math Help - Double angle formula equation

  1. #1
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    Double angle formula equation

    tan(θ+60) = 2, Find tanθ.

    *sqt3 = square root of 3



    My attempt:

    (tanΘ + tan60)/(1 - tanθtan60) = 2

    tanΘ + (sqt3) = 2 - 2(sqt3)tanθ

    tanΘ = (2 - (sqt3))/(2(sqt3) +1)


    The answer is given as the reciprical of this which I think is wrong but could somebody check for me please?
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  2. #2
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    Re: Double angle formula equation

    Sorry I miss read the question - it wanted cot anyway!
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