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March 30, 2017

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when you are determining a formula for cot(2x) using only tan(x) would the formula be...(1-tan^2(x))/(2tan(x))?

  • math - ,

    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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