A right circular cone is drawn above, with 2 circles centered at A on its base as shown. AB is the height of the cone, the measure of <ABC is 60° and BC has a length of y. If BD bisects <ABC, which one of the following gives the area of the smaller circle in terms of y?
The Attempt at a Solution
Included in the picture
Could you explain what I did wrong, and how to get the correct answer? Thanks