Trigonometry
3, -1.3 + 3.4i, -6.7 + 9.2i, -3, 5.8 - 7.5i, - 4.7 + 8.2i
3, 3/2 + (3i√3)/2, - 3/2 + (3i√3)/2, -3, - 3/2 - (3i√3)/2, 3/2 - (3i√3)/2
2, -10.2 + 2.6i, - 5.1 + 8.4i, -2, 8.3 - 6.3i, - 5.8 + 6.5i
2, 2/3 + (2i√2)/3, - 2/3 + (2i√2)/3, -2, - 2/3 - (2i√2)/3, 2/3 - (2i√2)/3