If $$\cos\left(\frac{\pi}{3}\right) = \frac{1}{2}$$ , then $...

Question Analysis
This problem assesses the student's understanding of the symmetry property of the cosine function, specifically that it is an even function.

Key Concept Explanation
An even function satisfies the property . For the cosine function, this means for any real number . Given , we can use the even property to find .

Step-by-step Solution
1. Recall the even function property: