Решите уравнение:

5sin x+6sin x*cos x=0

3cos²x-5cos x-2=0

5*sin (x) + 6*sin (2*x) + 5*sin (3*x) + sin (4*x) = 0; 10*sin (2*x) * cos (x) + 6*sin (2*x) + 2*sin (2*x) * cos (2*x) = 0;

2*sin (2*x) * (5*cos (x) + 3+cos (2*x)) = 0; 1) ; sin (2*x1) = 0;

2). 5*cos (x) + 3+cos (2*x) = 0; 2 * (cos (x)) ^2+5*cos (x) + 2=0; cos (x2) = - 0,5;