Geometry

Question Analysis  

The question asks for using the unit circle coordinates for , focusing on the relationship between cotangent, cosine, and sine.  

Key Concept Explanation  

Cotangent Definition: for unit circle coordinates . This is the reciprocal of tangent ().  

 

Step-by-Step Solution  

1. Identify and from coordinates:  

,  

.  

2. Calculate :  

.  

 

Common Mistakes  

Swapping x and y: Accidentally calculating

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