z_2: 1 / sqrt(2) - (1 / sqrt(2) * ί)
l1 = Sequence((315°) / 7 + ((360°) / 7 * p), p, 0, 6, 1)
a: 315 / 7
l2 = Sequence((1; Element[l1, n]), n, 1, 7, 1)
b: (1; (96.4286 * π / 180))^(7)
c: (96.4286 * 7)
d: c - 360