cos(x) = 1
sin(x) = 0
0
x1 = 12.56637061435917
x2 = 1.666152265044426e-29
x3 = -6.283185307179586
x4 = -1.666152265044426e-29
x5 = 6.283185307179586
x6 = -12.56637061435917