Evaluate Exactly $$\cos ^ { - 1 } \left( \cos \left( - \frac { \pi } { 6 } \right) \right)$$

question 335

Multiple Choice

Evaluate exactly.
- $$\cos ^ { - 1 } \left( \cos \left( - \frac { \pi } { 6 } \right) \right)$$

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

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