Evaluate the Trigonometric Function Using Its Period as an Aid $\cos \frac { 5 \pi } { 3 }$

question 9

Multiple Choice

Evaluate the trigonometric function using its period as an aid.​ $\cos \frac { 5 \pi } { 3 }$ ​

• A) \(\cos \frac { 5 \pi } { 3 } = \infty\)
• B) \(\cos \frac { 5 \pi } { 3 } = - \frac { 1 } { 2 }\)
• C) \(\cos \frac { 5 \pi } { 3 } = 2\)
• D) \(\cos \frac { 5 \pi } { 3 } = - 2\)
• E) \(\cos \frac { 5 \pi } { 3 } = \frac { 1 } { 2 }\)

---

Definitions:

Marginal Costs

The supplementary expense incurred from making one more unit of a product or service.

Fixed Costs

Costs that do not vary with the level of output in the short term, such as rent, salaries, and loan payments.

Total Revenue

The total amount of money received by a firm from the sale of its goods or services, calculated as price times quantity sold.

Total Variable Cost

The total of all costs that vary with the level of production, such as materials and labor costs.