Write Complex Numbers in Polar Form
-$- 4 \mathrm { i }$
A) $4 \left( \cos 270 ^ { \circ } + i \sin 270 ^ { \circ } \right)$
B) $4 \left( \cos 90 ^ { \circ } + i \sin 90 ^ { \circ } \right)$
C) $4 \left( \cos 180 ^ { \circ } + i \sin 180 ^ { \circ } \right)$
D) $4 \left( \cos 0 ^ { \circ } + \mathrm { i } \sin 0 ^ { \circ } \right)$

Question

Quizplus · Accepted Answer

The complex number $-4i$ can be represented in polar form as $4(\cos 270^\circ + i\sin 270^\circ)$, where the magnitude is 4 and the angle is $270^\circ$, indicating a direction along the negative imaginary axis.

Write Complex Numbers in Polar Form - −4i- 4 \mathrm { i }−4i

Write Complex Numbers in Polar Form
- $- 4 \mathrm { i }$