1. Orange: A widely consumed citrus fruit known for its sweet and tangy flavor.
2. Lemon: Popular for its sour taste, used in beverages and cooking.
3. Grapefruit: A larger citrus fruit with a bittersweet taste, rich in nutrients.
4. Lime: A small, sour citrus fruit often used in drinks and culinary dishes.
Citrus fruits are rich in vitamin C and antioxidants, making them essential for a healthy diet.
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 $\sin 2\theta$. 