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cot = 1/tan
tan = sin / cos
de = akar 4 kuadrat kurang 3 kuadrat
de = akar 16-9 = akar 7
sin = de/mi = akar 7/4
tan = akar7 /4 x 4/3 = 3 akar 7
cot = 1 / 3 akar 7