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Verified answer
2sin²x - 7sin x + 3 = 0(2sin x - 1)(sin x - 3) = 0
2sin x - 1 = 0
2sin x = 1
sin x = ½
sin yg hasilnya ½
x = 30 atau x = 150
sin x - 3 = 0
sin x = 3 (tidak memenuhi) jadi tidak ada sin yg bernilai 3
maka hp {30°, 150°}