8sinx·cosx=-2корень3

 4·2·sinx·cosx = -2·√3  4·sin2x =  -2·√3    sin2x= -2·√3/4 = - √3/2   2x = (-1)[в степени(k+1)]·π/3+πk  x = (-1)^(k+1)·π/6+πk