Perform the Indicated Operation $\left( 15 \operatorname { cis } 18.5 ^ { \circ } \right) \left( 5 \operatorname { cis } 7.5 ^ { \circ } \right)$

Perform the indicated operation. Give answers in rectangular form expressing real and imaginary parts to four decimal
places.
- $\left( 15 \operatorname { cis } 18.5 ^ { \circ } \right) \left( 5 \operatorname { cis } 7.5 ^ { \circ } \right)$

A) $3.8128 + 3.2346 \mathrm { i }$
B) $57.1919 + 67.4096 \mathrm { i }$
C) $9.7038 + 11.4384 \mathrm { i }$
D) $67.4096 + 32.8778 \mathrm { i }$

Correct Answer:

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