A
anh_thunder


$1. 2sin4x + 3cos2x + 16sin^3 x.cosx-5=0$
$2. 4sin^3 x - 1 = 3sinx - \sqrt{3}cos3x$
$3. cos2x - \sqrt{3} sin2x= 1+sin^2x$
$4. \sqrt{2+cos2x +\sqrt{3}cos2x}= sinx +\sqrt{3}cosx$
$2. 4sin^3 x - 1 = 3sinx - \sqrt{3}cos3x$
$3. cos2x - \sqrt{3} sin2x= 1+sin^2x$
$4. \sqrt{2+cos2x +\sqrt{3}cos2x}= sinx +\sqrt{3}cosx$