Perform the Indicated Operation Using Trigonometric Form $$( 2 + 2 i ) ( - 1 - i )$$

question 41

Multiple Choice

Perform the indicated operation using trigonometric form.Leave the answer in trigonometric forms. $$( 2 + 2 i ) ( - 1 - i )$$ ​

• A) \(- 2 \left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)\)
• B)​ \(4 \left( \cos \frac { 3 \pi } { 2 } - i \sin \frac { 3 \pi } { 2 } \right)\)
• C)​ \(4 \left( \cos \frac { 3 \pi } { 2 } + i \sin \frac { 3 \pi } { 2 } \right)\)
• D)​ \(- 2 \left( \cos \frac { 3 \pi } { 4 } + i \sin \frac { 3 \pi } { 4 } \right)\)
• E)​ \(2 \left( \cos \frac { 5 \pi } { 4 } + i \sin \frac { 5 \pi } { 4 } \right)\)

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Definitions:

Evaluation

The systematic process of collecting, analyzing, and using information to assess the effectiveness and impact of projects, programs, or policies.

Internal Referencing Strategy

A method in decision-making that relies on an individual's personal standards or experiences, rather than external sources.

Post-only Design

A research design involving measurements taken only after an intervention, with no pre-test comparison.

Cognitive Variables

Factors related to mental processes of perception, memory, judgment, and reasoning, as affecting learning or behavior.