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

question 53

Multiple Choice

Use the appropriate addition formula to find the exact value of the expression.
- $\cos \left( \frac { \pi } { 12 } \right)$

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

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Definitions:

Contribution

The act of providing a partial payment or service by a party among others towards a common goal or to make up for a joint liability.

Limited Partnership

A limited partnership is a form of partnership similar to a general partnership, except that in addition to one or more general partners, there are one or more limited partners who have limited liability to the extent of their investments and do not participate in the management of the business.

Promissory Note

A written promise to pay a specified sum of money to a designated person at a fixed or determinable future time.

Limited Status

A condition where certain rights or privileges are restricted or not fully granted compared to full status.