T
tinasuco96


Giải các ptlg sau:
[TEX]a, 2sin^2 3x + sin^2 6x -2 = 0[/TEX]
[TEX]b, 2cos2x + sinx = sin3x[/TEX]
[TEX]c, sinx + 2sin2x - sin3x = 3[/TEX]
[TEX]d, sinx - 2sin3x + \sqrt{3}. cosx = 0[/TEX]
[TEX]a, 2sin^2 3x + sin^2 6x -2 = 0[/TEX]
[TEX]b, 2cos2x + sinx = sin3x[/TEX]
[TEX]c, sinx + 2sin2x - sin3x = 3[/TEX]
[TEX]d, sinx - 2sin3x + \sqrt{3}. cosx = 0[/TEX]
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