Find the Exact Value of the Expression If θ = $g ( \theta ) = \cos \theta \quad$

question 117

Multiple Choice

Find the exact value of the expression if θ = 45°. Do not use a calculator.
- $g ( \theta ) = \cos \theta \quad$ Find $[ g ( \theta ) ] ^ { 2 }$ .

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

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Expectancy-value Theory

A psychological theory that explains motivation and behavior as a function of an individual's expectations for success and the value they place on achieving the goal.

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