Find the Product A) $- 7 \sqrt { 3 } - 7 \mathrm { i }$

Find the product. Write the product in rectangular form, using exact values.
- $\left[ 7 \left( \cos 120 ^ { \circ } + \mathrm { i } \sin 120 ^ { \circ } \right) \right] \left[ 2 \left( \cos 90 ^ { \circ } + \mathrm { i } \sin 90 ^ { \circ } \right) \right]$

A) $- 7 \sqrt { 3 } - 7 \mathrm { i }$
B) $5 \sqrt { 6 } - \sqrt { 2 } \mathrm { i }$
C) $7 \sqrt { 3 } - 28 \mathrm { i }$
D) $14 - 14 \sqrt { 3 } \mathrm { i }$

Correct Answer:

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