Find the Trigonometric Form of - 21 - 21i $\frac { 21 } { 2 } \left( \cos \frac { 5 \pi } { 2 } + i \sin \frac { 5 \pi } { 2 } \right)$

question 5

Multiple Choice

Find the trigonometric form of - 21 - 21i. ​

• A) \(\frac { 21 } { 2 } \left( \cos \frac { 5 \pi } { 2 } + i \sin \frac { 5 \pi } { 2 } \right)\)
• B)​ \(21 \left( \cos \frac { 5 \pi } { 2 } + i \sin \frac { 5 \pi } { 2 } \right)\)
• C)​ \(21 \left( \cos \frac { 5 \pi } { 4 } + i \sin \frac { 5 \pi } { 4 } \right)\)
• D)​ \(21 \sqrt { 2 } \left( \cos \frac { 5 \pi } { 4 } + i \sin \frac { 5 \pi } { 4 } \right)\)
• E)​ \(\frac { 441 } { 4 } \left( \cos \frac { 5 \pi } { 8 } + i \sin \frac { 5 \pi } { 8 } \right)\)

---

Definitions:

Generative

Capable of producing or creating something, often used in reference to the power of language, creativity, or the ability to generate life.

Caregiving

The act of providing support and assistance to individuals who are unable to fully care for themselves, due to age, illness, or disability.

Intrinsic Rewards

Motivational factors that come from within an individual, such as personal satisfaction or joy from accomplishing a task.

Absenteeism

The habit of being absent from work or other duties without a good reason, leading to decreased productivity and potential disciplinary action.