Write the Complex Number in Rectangular Form $4 \left( \cos 15 ^ { \circ } + i \sin 15 ^ { \circ } \right)$

question 83

Multiple Choice

Write the complex number in rectangular form.
- $4 \left( \cos 15 ^ { \circ } + i \sin 15 ^ { \circ } \right)$

• A) \(3.9 + 1 \mathrm { i }\)
• B) \(1.9 + 0.5 \mathrm { i }\)
• C) \(- 1.9 - 0.5 \mathrm { i }\)
• D) \(1 + 3.9 \mathrm { i }\)

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Definitions:

Interest

The cost of borrowing money, typically expressed as a percentage of the principal loan amount that has to be paid to the lender over a specific period.

Compounded Annually

A method where the interest earned is added to the principal sum at the end of each year, resulting in interest being earned on interest in subsequent years.

Compounded Annually

Refers to the process where interest earned on an investment is added to the principal, and the new total becomes the basis for computing interest in the next period.

Quadruple

To increase or to be increased fourfold.