Use a Calculator to Evaluate the Given Trigonometric Function $$\cos \left( 30 ^ { \circ } \right)$$

Multiple Choice

Use a calculator to evaluate the given trigonometric function. Round the answer to three decimal places as needed. $$\cos \left( 30 ^ { \circ } \right)$$ .

A) $0.866$
B) $0.966$
C) $1.066$
D) $0.766$
E) $0.666$