Use the Even-Odd Properties to Find the Exact Value of the Expression

question 350

Multiple Choice

Use the even-odd properties to find the exact value of the expression. Do not use a calculator.
- $\cos \left( - 60 ^ { \circ } \right)$

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

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Definitions:

Quadra-

A prefix meaning four or fourfold, used to describe quantities or units.

Within

Inside or not further than a certain area, time period, or range.

Endo-

A prefix meaning "inside," "within," or "internal."

-cidal

A suffix indicating a substance or agent that kills or destroys a specified type of organism, such as bactericidal, which kills bacteria.