4 sin (2x - 45 derajat) = 2 akar 2
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sin(2x - 45) = 1/2 √2
sin(2x - 45) = sin 45
2x - 45 = 45 + k 360
2x = 90 + k.360
x = 45 + k.180
k = 0 ==> x = 45
k = 1 ==> x = 225