Помогите пожалуйста!
{x+y=π/2 {sinx+cosx=√2; √2sin(π/4+x)=√2; sin(π/4+x)=1; π/4+x=π/2; x=(2π-π)/4; x=π/4; y=π/2-π/4; y=π/4 (π/4;π/4)