Use Substitution to Determine Whether the Given X-Value Is a Solution

question 222

Multiple Choice

Use substitution to determine whether the given x-value is a solution of the equation.
Find All Solutions of a Trigonometric Equation
- $2 \cos x - 1 = 0$

• A) \(x = \frac { \pi } { 3 } + 2 n \pi\) or \(x = \frac { 5 \pi } { 3 } + 2 n \pi\)
• B) \(x = \frac { \pi } { 3 } + n \pi\) or \(x = \frac { 5 \pi } { 3 } + n \pi\)
• C) \(x = \frac { 4 \pi } { 3 } + 2 n \pi\) or \(x = \frac { 5 \pi } { 6 } + 2 n \pi\)
• D) \(x = \frac { 4 \pi } { 3 } + n \pi\) or \(x = \frac { 5 \pi } { 6 } + n \pi\)

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Definitions:

Price Leadership

A situation in a market where one leading company sets the price of goods or services, and other companies in the market follow.

Tacit Collusion

A form of collusion among competing firms in an industry to raise prices or slow production informally without a direct agreement.

Price Leadership

A pricing strategy where a dominant firm in the market sets the price of goods or services, and other competitors follow.

Tacit Collusion

An unofficial agreement among competitors to limit competition and keep prices high, without explicit communication or legal contracts.