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Find an Exact Value cos⁡−7π12\cos \frac { - 7 \pi } { 12 }

Question 132

Multiple Choice

Find an exact value.
- cos⁡−7π12\cos \frac { - 7 \pi } { 12 }


A) 2−6\sqrt { 2 } - \sqrt { 6 }
B) 6+2\sqrt { 6 } + \sqrt { 2 }
C) 6−24\frac { \sqrt { 6 } - \sqrt { 2 } } { 4 }
D) 2−64\frac { \sqrt { 2 } - \sqrt { 6 } } { 4 }

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