Use an Identity to Write the Expression as a Single $2 \cos ^ { 2 } 75 ^ { \circ } - 1$

question 173

Multiple Choice

Use an identity to write the expression as a single trigonometric function or as a single number.
- $2 \cos ^ { 2 } 75 ^ { \circ } - 1$

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

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Definitions:

Person-Situation Controversy

The debate concerning whether the person or the situation is more influential in determining a person's behavior.

Environments

The surroundings or conditions in which an organism lives or operates, including natural, social, and built contexts.

Traits

Characteristics or qualities that form an individual's distinctive character, often considered to be innate and stable over time.

Emotional Instability

A characteristic of individuals who experience rapid, intense emotional changes that are difficult to predict.