Geometry

Question Analysis  

The main focus is using the Pythagorean identity to find  in a right triangle, given .  

 

Key Concept Explanation  

Pythagorean Identity: For any angle , . This applies to acute angles in right triangles, where > .  

 

Step-by-Step Solution  

1. Apply the Pythagorean identity:  

2. Substitute :  

3. Solve for :  

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