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sin^2 3x = 1
sin3x = +-V1
sin3x = 1
sin3x = sin90
3x = 90 + k 360..................
x = 30 + k.180..........tinggal masukkan nilai k nya ya...mulai dari 0 dst
sin3x = -1
sin3x = sin270
3x = 270 + k 360
x = 90 + k 180 ....................tinggal masukkan nilai k nya jg ya...