Solve the Equation (X in Radians and in Degrees) for All

question 41

Multiple Choice

Solve the equation (x in radians and in degrees) for all exact solutions where appropriate. Round approximate answers
in radians to four decimal places and approximate answers in degrees to the nearest tenth.
- $$\cos ^ { 2 } x + 2 \cos x = - 1$$

• A) \(\{ \pi + 2 n \pi \}\)
• B) \(\{ 2 n \pi \}\)
• C) \(\left\{ \frac { \pi } { 2 } + n \pi , 2 n \pi \right\}\)
• D) \(\{ n \pi \}\)

---

Definitions:

Federalism

A system of government in which power is divided between a central authority and constituent political units.

U.S. Constitution

The U.S. Constitution is the supreme law of the United States, establishing the framework for the federal government and the rights of the citizens.

Corporate Speech

Refers to the legal doctrine that extends certain protections of free speech to corporate entities, often related to political or marketing activities.

Political Speech

Speech that is used to support political candidates or referenda. Compared to other types of speech, it is given a high level of protection by the First Amendment.