Question

4sin^2 x + 4cos(п/2+x)=3sin п/2 и найти просежутки (-3п\2 ; 3п)

Answer 1

$4sin^{2} x-4sinx - 3=0$
$sinx = - \frac{1}{2}$
$x = -\frac{5p}{6} + 2pk$
$x = - \frac{p}{6} + 2pk$
$x = - \frac{p}{6}$
$x = -\frac{5p}{6}$
$x = \frac{7p}{6}$ 
$x = \frac{11p}{6}$