J
jinnie93
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
2[TEX]cos^3x[/TEX] + cos2x + sin x = 0
1 + [TEX]sin^3[/TEX]2x + [TEX]cos^3[/TEX]2x = 1/4 [TEX]sin^4[/TEX]x
1 + [TEX]sin^3[/TEX]2x + [TEX]cos^3[/TEX]2x = 1/4 [TEX]sin^4[/TEX]x
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