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Verified answer
A) -2 sin (2x - 60) = √3sin (2x - 60) = √3/-2
sin (2x - 60) = -½√3
sin (2x - 60) = sin 240
2x - 60 = 240
2x = 240 + 60
x = 300/2 = 150
atau
sin (2x - 60) = sin 300
2x - 60 = 300
2x = 300+60
x = 360/2 = 180
2) sin (3x - 30) = 1
sin (3x - 30) = sin 90
3x - 30 = 90
3x = 90 + 30
x = 120/30 = 40