Help mình 2cos9x-10sin3x-6=0

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Help mình
2cos9x-10sin3x-6=0

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Ladonna 4 years 2020-10-13T23:22:09+00:00 0 Answers 39 views 0

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )