B
bangtam81


1/ [TEX] \sqrt{3}cos^3(x)-5sin^3(x)+7sinx-(\frac{8}{\sqrt{3}}).cosx=0[/TEX]
2/ [TEX]14sin^3(x)+2sin^2(x).cos^2(x)-14sin^2(x)-8sinxcosx-1=0[/TEX]
2/ [TEX]14sin^3(x)+2sin^2(x).cos^2(x)-14sin^2(x)-8sinxcosx-1=0[/TEX]
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