Find the Exact Value of the Real Number Y $$y = \cos ^ { - 1 } \left( \frac { \sqrt { 2 } } { 2 } \right)$$

question 481

Multiple Choice

Find the exact value of the real number y.
- $$y = \cos ^ { - 1 } \left( \frac { \sqrt { 2 } } { 2 } \right)$$

• A) \(\frac { 7 \pi } { 4 }\)
• B) \(\frac { \pi } { 4 }\)
• C) \(\frac { \pi } { 6 }\)
• D) \(\frac { 11 \pi } { 6 }\)

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