Solve the Equation (X in Radians and θ in Degrees) $$\cos ^ { 2 } x - 1 = 0$$

question 97

Multiple Choice

Solve the equation (x in radians and θ 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.
- $$\cos ^ { 2 } x - 1 = 0$$

• A) \(\{ 2 n \pi \}\)
• B) \(\left\{ \frac { \pi } { 2 } + 2 n \pi \right\}\)
• C) \(\{ n \pi \}\)
• D) \(\left\{ \frac { \pi } { 3 } + n \pi \right\}\)

---

Definitions:

Approximates

Nearly close or similar to something, indicating an estimation or a closely similar value to the actual.

Monopolistic Competition

A market structure characterized by many sellers offering products that are similar but not identical, allowing for some degree of market power.

Four-Firm Concentration

is a metric that measures the total market share held by the four largest firms within an industry, indicating the level of market concentration and competition.

Barriers to Entry

Obstacles that make it difficult for new competitors to enter a market.