sin(x)*sin(y) = 3/4
cos(x)*cos(y) = 1/4
или
-1.04719755119660
-1.04719755119660
1.04719755119660
1.04719755119660
2.09439510239320
2.09439510239320
4.18879020478639
-2.09439510239320
x1 = -10.4719837981064 y1 = 14.66077400289279
x2 = -14.66077400289279 y2 = 10.4719837981064