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Find the Exact Value cos20π3\cos \frac { 20 \pi } { 3 }

Question 44

Multiple Choice

Find the exact value. Do not use a calculator.
- cos20π3\cos \frac { 20 \pi } { 3 }


A) 32- \frac { \sqrt { 3 } } { 2 }
B) 12\frac { 1 } { 2 }
C) 32\frac { \sqrt { 3 } } { 2 }
D) 12- \frac { 1 } { 2 }

Correct Answer:

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