Evaluate the Given Expression $\left( - \frac { 2 \pi } { 3 } \right)$

question 46

Multiple Choice

Evaluate the given expression. cos $\left( - \frac { 2 \pi } { 3 } \right)$

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

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