Perform the Indicated Operation $\left( 12 \operatorname { cis } 18.5 ^ { \circ } \right) \left( 5 \operatorname { cis } 6.5 ^ { \circ } \right)$

question 136

Multiple Choice

Perform the indicated operation. Give answers in rectangular form expressing real and imaginary parts to four decimal
places.
- $\left( 12 \operatorname { cis } 18.5 ^ { \circ } \right) \left( 5 \operatorname { cis } 6.5 ^ { \circ } \right)$

• A) \(54.3785 + 25.3571 \mathrm { i }\)
• B) \(11.8944 - 1.5882 \mathrm { i }\)
• C) \(- 0.6618 + 4.9560 \mathrm { i }\)
• D) \(- 7.9411 + 54.3785 \mathrm { i }\)

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