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    mwood19314's Avatar
    mwood19314 Posts: 1, Reputation: 1
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    #1

    Nov 4, 2011, 10:34 AM
    verify identity
    2tan(x/2)/(1 tan^2(x/2)) = sin x
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Nov 4, 2011, 10:55 AM
    The best way to get started is convert the tan functions to their sine and cosine equivalents, and simplify. You should end up with an equation that looks a lot like this identity:

    sin(2a) = 2sin(a)cos(a)
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