Perform the Indicated Operation $\left. \left. \cos 30 ^ { \circ } + i \sin 30 ^ { \circ } \right) \right] \left[ 3 \left( \cos 90 ^ { \circ } + i \sin 90 ^ { \circ } \right) \right]$

Perform the indicated operation. Give answers in rectangular form expressing real and imaginary parts to four decimal
places.
-[8( $\left. \left. \cos 30 ^ { \circ } + i \sin 30 ^ { \circ } \right) \right] \left[ 3 \left( \cos 90 ^ { \circ } + i \sin 90 ^ { \circ } \right) \right]$

A) $- 5.5000 + 9.5263 \mathrm { i }$
B) $- 0.5000 + 0.8660 \mathrm { i }$
C) $- 12.000 + 20.7846 \mathrm { i }$
D) $- 1.0000 + 1.7321 \mathrm { i }$

Correct Answer:

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