0
z = 1 + 0i
So
|rz| = 1 and az = 0 radians.
which allows you to write z = rz*cos(az) + i*sin(az)
Then, if y = z1/3 then
|y| = |z1/3| = |11/3| = 1
and
ay is the angle in [0, 360) such that 3*ay = 0 mod(2*pi)
that is, ay = 0, 2pi/3 and 4pi/3
And therefore,
Root 1 = cos(0) + i*sin(0)
Root 2 = cos(2pi/3) + i*sin(2pi/3) and
Root 3 = cos(4pi/3) + i*sin(4pi/3).
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