Write the Complex Number in Rectangular Form $10.83 \left( \cos 30 ^ { \circ } + i \sin 30 ^ { \circ } \right)$

Multiple Choice

Write the complex number in rectangular form.
- $10.83 \left( \cos 30 ^ { \circ } + i \sin 30 ^ { \circ } \right)$

A) $2.8 + 1.6 \mathrm { i }$
B) $5.4 + 9.4 \mathrm { i }$
C) $- 2.8 - 1.6 \mathrm { i }$
D) $9.4 + 5.4 \mathrm { i }$