Find the Given Power $\left( \cos 30 ^ { \circ } + i \sin 30 ^ { \circ }) \right.$

Multiple Choice

Find the given power. Write answer in rectangular form.
- $\left( \cos 30 ^ { \circ } + i \sin 30 ^ { \circ }) \right.$$^{18}$

A) $- 1$
B) $\mathrm { i }$
C) $- \mathrm { i }$