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

Question 7

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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