Use De Moivre's Theorem to Find the Indicated Power of the Complex

question 226

Multiple Choice

Use De Moivre's Theorem to find the indicated power of the complex number. Write your answer in standard form a + bi.
- $\left( 4 \left( \cos 90 ^ { \circ } + i \sin 90 ^ { \circ } \right) \right) ^ { 5 }$

• A) 1024
• B) \(1024 \mathrm { i }\)
• C) \(20 \mathrm { i }\)
• D) 0

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