Perform the Operation Shown Below and Leave the Result in Trigonometric

question 224

Multiple Choice

Perform the operation shown below and leave the result in trigonometric form. $\left[ 4 \left( \cos \frac { 2 \pi } { 3 } + i \sin \frac { 2 \pi } { 3 } \right) \right] \left[ 3 \left( \cos \frac { 3 \pi } { 7 } + i \sin \frac { 3 \pi } { 7 } \right) \right]$

• A) \(7 \left( \cos \frac { 23 \pi } { 21 } + i \sin \frac { 23 \pi } { 21 } \right)\)
• B) \(12 \left( \cos \frac { 23 \pi } { 21 } + i \sin \frac { 23 \pi } { 21 } \right)\)
• C) \(12 \left( \cos \frac { 2 \pi } { 3 } + i \sin \frac { 2 \pi } { 3 } \right)\)
• D) \(12 \left( \cos \frac { 2 \pi } { 7 } + i \sin \frac { 2 \pi } { 7 } \right)\)
• E) \(7 \left( \cos \frac { 2 \pi } { 7 } + i \sin \frac { 2 \pi } { 7 } \right)\)

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Interest Rate

The percentage of a sum of money charged for its use, determining how much borrowers pay to lenders for loans or how much they earn on deposits.

Retirement

The act of leaving one's job or career and ceasing to work, typically due to age or health reasons, often accompanied by receipt of a pension or retirement savings.

Income

The amount of money received, usually from work, investments, or business, over a period.

Retirement

The period of one's life after leaving one's job and ceasing to work, typically due to age or health reasons, often supported by savings or pension.