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Giải PT lượng giác:
a) [TEX]8 sinx = \frac{1}{sin x} + \frac{\sqrt{3}}{cosx}[/TEX]
b) [TEX]\frac{sin^{3}x + cos^{3}x}{2cosx - sinx} = cos2x[/TEX]
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a) [TEX]8 sinx = \frac{1}{sin x} + \frac{\sqrt{3}}{cosx}[/TEX]
b) [TEX]\frac{sin^{3}x + cos^{3}x}{2cosx - sinx} = cos2x[/TEX]
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