Find the Exact Circular Function Value $$\cos \frac { - 2 \pi } { 3 }$$

question 4

Multiple Choice

Find the exact circular function value.
- $$\cos \frac { - 2 \pi } { 3 }$$

• A) undefined
• B) \(- \frac { 1 } { 2 }\)
• C) \(- \frac { \sqrt { 3 } } { 2 }\)
• D) \(\frac { \sqrt { 3 } } { 2 }\)

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