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

question 26

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) \(9 \mathrm { i }\)
• D) \(- 9\)

---

Definitions:

Malpractice

Negligence, incompetence, or unethical behavior by a professional, especially in medicine, leading to harm or injury.

Licensed Professional

An individual who has been granted permission to practice a particular profession by a recognized authority.

Chest Compressions

A critical component of cardiopulmonary resuscitation (CPR), involving pressing down on the chest of a cardiac arrest victim to maintain blood flow.

CPR

Stands for Cardiopulmonary Resuscitation, an emergency procedure combining chest compressions with artificial ventilation to manually preserve brain function until further measures to restore spontaneous blood circulation and breathing in a person in cardiac arrest.