Find the Exact Value of the Expression $\cos 2040 ^ { \circ }$

question 216

Multiple Choice

Find the exact value of the expression.
- $\cos 2040 ^ { \circ }$

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

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