Perform the Indicated Operation $\left[ 28.6 \operatorname { cis } \frac { 2 \pi } { 7 } \right] ^ { 2 }$

question 303

Multiple Choice

Perform the indicated operation. Give answers in rectangular form expressing real and imaginary parts to four decimal
places.
- $\left[ 28.6 \operatorname { cis } \frac { 2 \pi } { 7 } \right] ^ { 2 }$

• A) \(797.4520 - 182.0132 \mathrm { i }\)
• B) \(- 182.0132 + 797.4520 \mathrm { i }\)
• C) \(509.9897 + 639.5069 \mathrm { i }\)
• D) \(- 6.3641 + 27.8829 \mathrm { i }\)

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