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  • Nov 4, 2011, 10:34 AM
    mwood19314
    verify identity
    2tan(x/2)/(1 tan^2(x/2)) = sin x
  • Nov 4, 2011, 10:55 AM
    ebaines
    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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