Geometry

Question Analysis  

The question asks which angle corresponds to the unit circle coordinates , focusing on distinguishing 30-60-90 triangle ratios in Quadrant I.  

 

Key Concept Explanation  

30-60-90 Triangle Ratios:  

At 60°,  (x-coordinate),  (y-coordinate).  

 

Step-by-Step Solution  

1. Recall 30-60-90 coordinates:  

30°: ,  

60°:

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