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Write the Product as a Sum or Difference of Trigonometric cos⁡(−7π12)\cos \left( - \frac { 7 \pi } { 12 } \right)

Question 29

Multiple Choice

Write the product as a sum or difference of trigonometric functions.
- cos⁡(−7π12) \cos \left( - \frac { 7 \pi } { 12 } \right)


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

Correct Answer:

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