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posted by kim on Sunday, April 19, 2009 at 5:31am.
when you are determining a formula for cot(2x) using only tan(x) would the formula be...(1-tan^2(x))/(2tan(x))?
yes, since tan 2x = 2tan x/(1-tan^2 x) and cot 2x = 1/tan 2x, you formed the reciprocal correctly
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