Geometry

Question Analysis  

The main focus is using the co-function identity to relate  to  of its complementary angle.  

 

Key Concept Explanation  

Co-function identity: .

 

Step-by-Step Solution  

1. Apply the co-function identity:  

 

 

Option Analysis  

: Incorrect (not related by co-function identity).  

: Incorrect (equals  via QII reduction, not co-function).  

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