Question 86
Let $R$ and $S$ be distinct points on circle $\Omega$, and let $t$ denote the tangent line to $\Omega$ at $R$. Point $R'$ is the reflection of $R$ with respect to $S$. A point $I$ is chosen on the smaller arc $RS$ of $\Omega$ so that the circumcircle $\Gamma$ of triangle $ISR'$ intersects $t$ at two different points. Denote by $A$ the common point of $\Gamma$ and $t$ that is closest to $R$. Line $AI$ meets $\Omega$ again at $J$. Show that $JR'$ is tangent to $\Gamma$.