Question

Помогите решить систему Cos(x+y)=0 Cos(x-y)=1

Answer 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