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Toán Lớp 11: Giúp mình với Cos(π/6-2x)=-1/2 Cot(3x+10°)=√3/3 Cot (2x-π/3)=1

Home/ Toán Lớp 11: Giúp mình với Cos(π/6-2x)=-1/2 Cot(3x+10°)=√3/3 Cot (2x-π/3)=1

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