Sin(4x+Π/6)*cos(5x-Π/2)=0
Sin(4x+π/6)=0 4x+π/6=πn 4x=-π/6+πn x=-π/24+πn/4,n∈z cos(5x-π/2)=0 sin5x=0 5x=πn x=πn/5,n∈z