Geometry

Question Analysis  

Determine when the legs of the right triangle for on the unit circle are equal, focusing on 45-45-90 triangle properties.  

 

Key Concept Explanation  

45-45-90 Triangle: Legs are equal (), so .  

 

Step-by-Step Solution  

1. Equal legs imply :  

In a unit circle triangle, .  

2. Substitute :  

.  

 

Option Analysis

: Incorrect (60° tangent)