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maka sisi miring=√3
sin x = 1/√3 = 1/3√3
cosx= 2/√3 =2/3√3
2sin x = 2 . 1/2√3 = 2/3√3
sin(x+π/2)=- cos x = - 2/3√3
cos(π-x) = -cos x = -2/3√3
hailnya = -2/3√3