Question

Решите уравнение
$4 sin(3x - 11pi div 2) = 3$

Answer 1

$sin(3x) cos( frac{11pi}{2} ) - cos(3x) sin( frac{11pi}{2} ) = frac{3}{4} \ cos(3x) = frac{3}{4} \ 3x = arccos( frac{3}{4} ) \ x = frac{arccos( frac{3}{4}) }{3}$