CRI (Crown Root Initiation) is the most critical stage of irrigation for wheat. Adequate water supply at this stage ensures proper root development, which is vital for nutrient and water uptake.
In the adjoining figure, TP and TQ are tangents drawn to a circle with centre O. If $\angle OPQ = 15^\circ$ and $\angle PTQ = \theta$, then find the value of $\sin 2\theta$. 