Question

Evaluate 2 sin 15 degrees cos 15 degrees?

Answer 1

$$\begin{gathered} 2\sin 15°\cos 15° \\ =\sin \left(2\times 15°\right)\{\mathrm{since}2\mathrm{sinAcosA}=\sin 2\mathrm{A}\} \\ =\sin 30° \\ =\frac{1}{2} \end{gathered}$$