4sin²(х/2) - 3 = 0
4sin²(х/2) = 3
sin²(х/2) = 3/4
sin(х/2)=√3/2 или sin(х/2)=-√3/2
sin(х/2)=(-1)^n*arcsin√3/2+πn, n∈Z sin(х/2)=(-1)^n*arcsin(-√3/2)+πn, n∈Z
sin(х/2)=(-1)^n*(π/3)+πn sin(х/2)=(-1)^(n+1)*(π/3)+πn
sin(x) = (-1)^n*(2π/3)+2πn sin(x) = (-1)^(n+1)*(2π/3)+2πn