cosx+siny=2*sin(45+0.5x+0.5y) cos(45+0.5x-0.5y)=1
cos(45+0.5x-0.5y)=cos0=1
sin(45+0.5x+0.5y)=1/2 n∈Z
1) 45+0.5x+0.5y=30+2*pi*n
x+y=4*pi*n - 30
x-y= -45 x=2*pi*n-37.5 y=2*pi*n+7.5 n∈Z
2) 45+0.5x+0.5y=150+2*pi*n
x+y=210+4*pi*n
x-y= -45 x=82.5+2*pi*n y=127.5+2*pi*n n∈Z