Решить систему уравнений: x+y=пи/2 sinx+siny=- корень из 2
{x+y=π/2⇒y=π/2-x {sinx+siny=-√2 sinx+sin(π/2-x)=-√2 2sinπ/4*cos(x-π/4)=-√2 2*√2/2*cos(x-π/4)=-√2 cos(x-π/4)=-1 x-π/4=0 x=π/4 y=π/2-π/4=π/4 (π/4;π/4)