Algebra-2

Question Analysis
This problem assesses the understanding of the cosine ratio in a right triangle.

Key Concept Explanation
The cosine of an angle in a right triangle is the ratio of the length of the adjacent side to the hypotenuse. Mathematically, .

Step-by-step Solution
1. Identify the given values: Adjacent side = 8 units, Hypotenuse = 17 units.
2. Use the cosine ratio formula: ...