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sin (x + 10) = 1/√2
sin (x + 10) = sin 45
x1 + 10 = 45 + k.360
maka x1 = 35 + k.360
x2 + 10 = 135 + k.360
maka x2 = 125 + k.360
k = 0 maka x1 = 35 dan x2 = 125
HP = {35, 125}