Giải phương trình lượng giác
$2\sqrt{3}sin^{3}x+\left ( cosx+1 \right )\left ( 6cosx-9 \right )+3sin2x.sinx+6=0$
$2\sqrt{3}sin^{3}x+\left ( cosx+1 \right )\left ( 6cosx-9 \right )+3sin2x.sinx+6=0$
Started By hoangngochai, 05-11-2017 - 15:20
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