Perform the Indicated Operation $\left[ 2 \operatorname { cis } \frac { 5 \pi } { 9 } \right] ^ { 2 }$

Multiple Choice

Perform the indicated operation. Give answers in rectangular form expressing real and imaginary parts to four decimal
places.
- $\left[ 2 \operatorname { cis } \frac { 5 \pi } { 9 } \right] ^ { 2 }$

A) $- 1.3681 - 3.7588 \mathrm { i }$
B) $- 0.6946 + 3.9392 \mathrm { i }$
C) $- 1.8794 - 0.6840 \mathrm { i }$
D) $- 3.7588 - 1.3681 \mathrm { i }$