Transport Aircraft: Aircraft designed to transport cargo, troops, and equipment efficiently over long distances.
Types of Transport Aircraft: 1. C-130 Hercules (Cargo Transport). 2. C-17 Globemaster (Heavy-Lift Transport). 3. Antonov AN-32 (Tactical Transport). 4. IL-76 (Strategic Airlift).
In the adjoining figure, $\triangle CAB$ is a right triangle, right angled at A and $AD \perp BC$. Prove that $\triangle ADB \sim \triangle CDA$. Further, if $BC = 10$ cm and $CD = 2$ cm, find the length of AD. 
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 $\sin 2\theta$. 