Find the Exact Value of the Expression, If Possible $\cos ^ { - 1 } \left[ \cos \left( - \frac { \pi } { 6 } \right] \right.$

question 110

Multiple Choice

Find the exact value of the expression, if possible. Do not use a calculator.
- $\cos ^ { - 1 } \left[ \cos \left( - \frac { \pi } { 6 } \right] \right.$

• A) \(\frac { \pi } { 6 }\)
• B) \(\frac { 5 \pi } { 6 }\)
• C) \(- \frac { \pi } { 6 }\)
• D) \(\frac { 7 \pi } { 6 }\)

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