SOLUTION: if O is in quadrant I and tan 0=u then tan 2O=?

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Question 841899: if O is in quadrant I and tan 0=u then tan 2O=?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
if O is in quadrant I and tan 0=u then tan 2O=?
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Ans: tan(2t) = 2tan(t)/[1-tan^2(t)] = 2(u)/[1-u^2)
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Cheers,
Stan H.
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