sin5x*cos3x-cos5x*sin3x=-0,5
Формула [r]sin( α - β )=[/r] sin(5x-3x)=-0,5 sin2x=-0,5 2x=(-1)^(k)*(-(π/6))+πk, k ∈ Z x=(-1)^([b]k[/b])*(-(π/12))+(π/2)*k, k ∈ Z x=(-1)^([b]k+1[/b])*(π/12)+(π/2)*k, k ∈ Z