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Toán Lớp 11: a) cos(x)^2 + cos(x) + sin(x)^3 = 0 b) sin ²x3 – cos ²4x – sin ²5x – cos ²6x c) 9sinx + 6cos – 3sin2x + cos2x = 8 GIÚP!! CẦN GẤP

Home/ Toán Lớp 11: a) cos(x)^2 + cos(x) + sin(x)^3 = 0 b) sin ²x3 – cos ²4x – sin ²5x – cos ²6x c) 9sinx + 6cos – 3sin2x + cos2x = 8 GIÚP!! CẦN GẤP

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