cos(x) = 0
1 - y = 2 + x
1 - y = x + 2
-4.71238898038469
3.71238898038469
-1.57079632679490
0.570796326794897
x1 = 1.570796326794897 y1 = -2.570796326794897
x2 = -1.570796326794897 y2 = 0.5707963267948966
x3 = -10.99557428756428 y3 = 9.995574287564276
x4 = 10.99557428756428 y4 = -11.99557428756428
x4 = 10.99557428756428 y4 = -11.99557428756428