Write the Complex Number in Rectangular Form $9 \left( \cos 180 ^ { \circ } + i \sin 180 ^ { \circ } \right)$

question 108

Multiple Choice

Write the complex number in rectangular form.
- $9 \left( \cos 180 ^ { \circ } + i \sin 180 ^ { \circ } \right)$

• A) \(- 9\)
• B) \(- 9 \mathrm { i }\)
• C) 9
• D) \(9 \mathrm { i }\)

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Definitions:

Data

Information that has been translated into a form that is efficient for movement or processing.

Weighted Mean

An average where each data point contributes to the mean with a weight that reflects its importance or frequency.

Median

The middle value in a set of data when the values are arranged in ascending or descending order, or the average of the two middle values when there is an even number of values.

Extreme Scores

Observations or data points that are significantly higher or lower than the majority of other values in a dataset, potentially influencing overall analysis.