In a 45-45-90 triangle, if each leg is 7 units, then $$ \tan...

Question Analysis
This problem tests the application of the tangent function in a 45-45-90 triangle.

Key Concept Explanation
In a 45-45-90 triangle, both legs are equal, and the tangent of 45 degrees is always 1.

Step-by-step Solution
1. Identify the sides of the 45-45-90 triangle: both legs are 7 units.
2. Calculate the tangent: