помогите решить, за найлучшее решение 10пкт
sin x+sin y=-√2
x+y=π
x=π-y
sin(π-y)+sin y=-√2
siny+siny=-√2
2siny=-√2
sin y=-√2/2
y₁=-π/4+2πn, x₁=π+π/4+2πn=5π/4+2πn
y₂=-3π/4+2πn, x₂=π+3π/4+2πn=7π/4+2πn
(5π/4+2πn;-π/4+2πn) , (7π/4+2πn; -3π/4+2πn)