The value of $$\cos(-2\pi)$$ is __________.

Question Analysis
This problem assesses the student's knowledge of the value of the cosine function at a specific point.

Key Concept Explanation
The cosine function, , has specific key points within one period.
For the cosine function, this means for all in its domain.

Step-by-step Solution
1. Recall the value of the cosine function at key points.
2. At ,