Use Identities to Find the Exact Value $\cos \left( \frac { \pi } { 12 } \right)$

question 272

Multiple Choice

Use Identities to find the exact value.
- $\cos \left( \frac { \pi } { 12 } \right)$

• A) \(\frac { - \sqrt { 6 } - \sqrt { 2 } } { 4 }\)
• B) \(\frac { \sqrt { 6 } - \sqrt { 2 } } { 4 }\)
• C) \(\frac { \sqrt { 2 } - \sqrt { 6 } } { 4 }\)
• D) \(\frac { \sqrt { 6 } + \sqrt { 2 } } { 4 }\)

---

Definitions:

Americanize

The process of assimilating or causing someone to assimilate to American customs, values, and culture.

Immigrants

Individuals who move from one country to another with the intention of settling in the new country, often for economic, social, or political reasons.

U.S. Citizen

A legal member of the United States, either by birth or naturalization, who is entitled to the rights and responsibilities outlined in the U.S. Constitution.

Progressive-Era Immigration

A period from the late 19th to early 20th century characterized by high levels of immigration to the United States, with significant cultural, societal, and political impacts.