GIUP MINH MAY BAI TOAN 11 VOI.?

bai 1: sin(bình)x + sinxcosx - 4cos(bình)x + 1 = 0

Bài 2: 4sin(bình)x - 3/2sin2x - cos(bình)x = 0

MÌNH CẢM ƠN TRƯỚC NHÉ!

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