Geometry

Question Analysis  

The main focus is using the co-function identity for complementary angles in a right triangle.  

 

Key Concept Explanation  

Complementary Angles: In a right triangle, acute angles sum to , so  (co-function identity).  

 

Step-by-Step Solution  

1. Identify the complementary angle relationship:  

Since  and  are complementary, .  

2. Substitute the given value:  

Given , directly apply the identity:  

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