IZhO 2023 Problem 2
The tangent at to , the circumcircle of scalene triangle intersects at . Through point , a line is drawn that intersects segments and at and respectively. On the segment points and are marked such that and . Lines and intersect at point lying inside the triangle . Let be the circumcircle of . Suppose intersects again at . Show that is tangent to .
Dataset text AI-MO AoPS. Quoted with source.
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