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) \(- 7.9411 + 54.3785 \mathrm { i }\)

---

Definitions:

Correlational Study

A research approach that seeks to find out if there is a relationship between two or more variables through statistical analysis, without establishing a cause-and-effect link.

Causation

The relationship between cause and effect, where one event (the cause) is responsible for the occurrence of another event (the effect).

Experimental Study

An investigative approach that directly manipulates variables to determine cause-and-effect relationships.

Cause-and-effect Relationship

A connection between two variables where a change in one directly causes a change in the other.