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Find an Exact Value cos19π12\cos \frac { 19 \pi } { 12 }

Question 17

Multiple Choice

Find an exact value.
- cos19π12\cos \frac { 19 \pi } { 12 }


A) 624\frac { - \sqrt { 6 } - \sqrt { 2 } } { 4 }
B) 6+24\frac { \sqrt { 6 } + \sqrt { 2 } } { 4 }
C) 624\frac { \sqrt { 6 } - \sqrt { 2 } } { 4 }
D) 264\frac { \sqrt { 2 } - \sqrt { 6 } } { 4 }

Correct Answer:

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