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![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
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lượng giác
[TEX][/TEX](sinx-\sqrt{3}cosx)(sinx+cosx)=2\sqrt2sin(x-7\pi/4)[/TEX]
[TEX][/TEX](sinx-\sqrt{3}cosx)(sinx+cosx)=2\sqrt2sin(x-7\pi/4)[/TEX]
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