Question

What is the root of z for k = 1 (of the 2nd roots)?

$$z = 9\left(\cos 90^\circ + i\sin 90^\circ\right)$$

Accepted Answer

$$3\left(\cos 225^\circ + i\sin 225^\circ\right)$$

Answer

$$3\left(\cos 270^\circ + i\sin 270^\circ\right)$$

Answer

$$9\left(\cos 225^\circ + i\sin 225^\circ\right)$$

Answer

$$3\left(\cos 45^\circ + i\sin 45^\circ\right)$$

Practice: Complex Roots - Nth Root to Single Root