Помогите решить систему Cos(x+y)=0 Cos(x-y)=1
Х+у=π/2+πn x-y=2πm n,m∈N 2x=π/2+πn+2πm x=π/4+π/2 n+πm 2y=π/2+πn-2πm y=π/4+π/2 n-πm