Find the Given Power $\left[ 3 \operatorname { cis } 15 ^ { \circ } \right] ^ { 4 }$

question 215

Multiple Choice

Find the given power. Write answer in rectangular form.
- $\left[ 3 \operatorname { cis } 15 ^ { \circ } \right] ^ { 4 }$

• A) \(\frac { 81 } { 2 } + \frac { 81 } { 2 } \mathrm { i }\)
• B) \(\frac { 81 } { 2 } \sqrt { 3 } + \frac { 81 } { 2 } \mathrm { i }\)
• C) \(\frac { 81 } { 2 } + \frac { 81 } { 2 } \mathrm { i } \sqrt { 3 }\)
• D) \(81 \mathrm { i }\)

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