Y
youtobe154
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
Tìm tập xác định .
y=[tex]\sqrt{1+sin(x)-2cos^2x}[/tex]
y=[tex]\sqrt{1+sin(x)-2cos^2x}[/tex]
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