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thanhthuy9x
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
Giải pt :
1. cot x - tan x = sin x + cos x
2. [TEX]\sqrt{3}[/TEX]cos5x - 2sin3x + cos2x - sinx = 0
3. sinx + cossx.sinx + [TEX]\sqrt{3}[/TEX]cos3x = 2(coss4x + [TEX]sin^3x[/TEX])
1. cot x - tan x = sin x + cos x
2. [TEX]\sqrt{3}[/TEX]cos5x - 2sin3x + cos2x - sinx = 0
3. sinx + cossx.sinx + [TEX]\sqrt{3}[/TEX]cos3x = 2(coss4x + [TEX]sin^3x[/TEX])