Find the Exact Function Value $\cos ^ { - 1 } ( 1 )$

question 49

Multiple Choice

Find the exact function value.
- $\cos ^ { - 1 } ( 1 )$

• A) 1
• B) \(\frac { \pi } { 4 }\)
• C) \(\frac { \pi } { 2 }\)
• D) 0

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