Find the Exact Value by Using a Half-Angle Identity $\cos 75 ^ { \circ }$

question 127

Multiple Choice

Find the exact value by using a half-angle identity.
- $\cos 75 ^ { \circ }$

• A) \(\frac { 1 } { 2 } \sqrt { 2 - \sqrt { 3 } }\)
• B) \(- \frac { 1 } { 2 } \sqrt { 2 - \sqrt { 3 } }\)
• C) \(\frac { 1 } { 2 } \sqrt { 2 + \sqrt { 3 } }\)
• D) \(- \frac { 1 } { 2 } \sqrt { 2 + \sqrt { 3 } }\)

Evaluate the decision-making process involved in R&D spending by firms.

Understand the concept of marginal utility (MU) in the adoption of new products by consumers.

Interpret data related to R&D expenditures and determine optimal spending levels.

Understand the concept and importance of utility maximization in consumer behavior.

---

Definitions:

16th Century Monarchs

Pertains to the rulers of various kingdoms and countries around the world during the 16th century, a period marked by significant political, cultural, and religious changes including the Renaissance and Reformation.

Mediterranean

A sea connected to the Atlantic Ocean, surrounded by the Mediterranean region and almost completely enclosed by land.

World Slavery

The historic global institution of enslaving humans for labor, trade, and exploitation, spanning various cultures and epochs.