Perform the Indicated Operation $\left[ 5 \operatorname { cis } \frac { 4 \pi } { 9 } \right] ^ { 2 }$

question 4

Multiple Choice

Perform the indicated operation. Give answers in rectangular form expressing real and imaginary parts to four decimal
places.
- $\left[ 5 \operatorname { cis } \frac { 4 \pi } { 9 } \right] ^ { 2 }$

• A) \(- 23.4923 + 8.5505 i\)
• B) \(8.5505 - 23.4923 \mathrm { i }\)
• C) \(- 4.6985 + 1.7101 \mathrm { i }\)
• D) \(4.3412 + 24.6202 \mathrm { i }\)