Perform the indicated operation. Give answers in rectangular form expressing real and imaginary parts to four decimal places.(12 cis 18.5°)(5 cis 6.5°)
A. 54.3785 + 25.3571i
B. -7.9411 + 54.3785i
C. -0.6618 + 4.9560i
D. 11.8944 - 1.5882i
Answer: A
Mathematics
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