tommy-slick
tommy-slick
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i do it by memorizing the unit circle: cos(4pi/3) = -1/2 csc(4pi/3) = 1 / sin(4pi/3) = 1 / -sqrt(3) / 2 = -2sqrt(3) / 3 cot(4pi/3) = 1 / tan(4pi / 3) = cos(4pi/3) / sin(4pi/3) = (-1/2) / (-2sqrt(3) / 3) = 3 / 4sqrt(3) = sqrt(3) / 4
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i do it by memorizing the unit circle: cos(4pi/3) = -1/2 csc(4pi/3) = 1 / sin(4pi/3) = 1 / -sqrt(3) / 2 = -2sqrt(3) / 3 cot(4pi/3) = 1 / tan(4pi / 3) = cos(4pi/3) / sin(4pi/3) = (-1/2) / (-2sqrt(3) / 3) = 3 / 4sqrt(3) = sqrt(3) / 4