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Omni-MATH / Let ABC be an acute triangle and let M be the midpoint of AC. A circle ω passing through B and M meets the sides AB and BC at points P and Q respectively. Let T be the point such t…

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problem

Let ABCABC be an acute triangle and let MM be the midpoint of ACAC. A circle ω\omega passing through BB and MM meets the sides ABAB and BCBC at points PP and QQ respectively. Let TT be the point such that BPTQBPTQ is a parallelogram. Suppose that TT lies on the circumcircle of ABCABC. Determine all possible values of BTBM\frac{BT}{BM}.
Plain-text mathematical notation (without MathML)
Let ABC be an acute triangle and let M be the midpoint of AC. A circle ω passing through B and M meets the sides AB and BC at points P and Q respectively. Let T be the point such that BPTQ is a parallelogram. Suppose that T lies on the circumcircle of ABC. Determine all possible values of (BT)/(BM).
Original LaTeX notation
Let $ABC$ be an acute triangle and let $M$ be the midpoint of $AC$. A circle $\omega$ passing through $B$ and $M$ meets the sides $AB$ and $BC$ at points $P$ and $Q$ respectively. Let $T$ be the point such that $BPTQ$ is a parallelogram. Suppose that $T$ lies on the circumcircle of $ABC$. Determine all possible values of $\frac{BT}{BM}$.

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