Question

Picture attached below

Answer 1

A. 5/13

General Formulas and Concepts:

Pre-Algebra

• Simplifying Fractions

Geometry

• [Right Triangles Only] SOHCAHTOA
• [Right Triangles Only] cosθ = adjacent over hypotenuse

Explanation:

Step 1: Identify

Angle θ = C

Adjacent Leg = 10

Hypotenuse = 26

Step 2: Find ratio

1. Substitute [cosine]: cos∠C = 10/26
2. [Fraction] Simplify: cos∠C = 5/13