Write the Complex Number in the Form a + Bi $$\left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)$$

question 118

Multiple Choice

Write the complex number in the form a + bi.
- $$\left( \cos \frac { \pi } { 2 } + i \sin \frac { \pi } { 2 } \right)$$

• A) 7
• B) \(7 \mathrm { i }\)
• C) \(- 7\)
• D) \(- 7 i\)

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Definitions:

Residual Income

The amount of income that an entity has after all personal debts and expenses have been paid, often used in personal finance, or an approach to measure a department's or investment's profitability after charging cost of capital.

Invested Capital

The cumulative sum of funds invested by stockholders and creditors into a firm for long-term purposes.

Interest Rate

The amount charged by a lender to a borrower for the use of assets, usually expressed as a percentage of the principal.

Asset Turnover

A ratio that calculates how effectively a company utilizes its assets to produce sales income.