S
sunshineprince


Giải PTLG
1. [TEX]Sinx + 2cosx + cos2x - sin2x = 0[/TEX]
2. [TEX]tan2x + sin2x = \frac{3}{2} cotx[/TEX]
1. [TEX]Sinx + 2cosx + cos2x - sin2x = 0[/TEX]
2. [TEX]tan2x + sin2x = \frac{3}{2} cotx[/TEX]
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