Find the Exact Value of the Expression $\cos 840 ^ { \circ }$

question 102

Multiple Choice

Find the exact value of the expression.
- $\cos 840 ^ { \circ }$

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

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Definitions:

Cohesiveness

The degree to which members of a group or team are united in pursuing common goals and how well they stick together.

Diverse Groups

consist of individuals from a wide range of backgrounds, cultures, and perspectives, bringing varied experiences and ideas to the group.

Deep Diversity

A concept that goes beyond surface-level diversity to include a mix of individuals with different values, beliefs, experiences, and cognitive styles.

Surface Diversity

Observable differences among individuals in a group, such as ethnicity, age, gender, and physical abilities, without necessarily considering deeper aspects like values or experiences.