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connguoivietnam


câu 1
[TEX]2\sqrt{3}cos2x - tanx = 4sin^2(x - \frac{\pi}{4}) + cot2x[/TEX]
[TEX]2\sqrt{3}cos2x - tanx = 4sin^2(x - \frac{\pi}{4}) + cot2x[/TEX]
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