Y by Rounak_iitr, buddyram, GeoKing, ItsBesi
Let
be a triangle. Let
be a circle passing through
intersecting
at
and
at
. Let
be the intersection of
and
. Further, let
and
be the intersections of
and
with the tangent to
at
. Now, let
be the second intersection of
and
. Then, prove that
,
,
,
and
are concyclic.























