Question

The period of the function $y = \sin 2x$is

• A. $2\pi$
• B. $\pi$
• C. $\frac{\pi}{2}$
• D. $4\pi$

Answer 1

Answer: (A)

$2\pi$

Answer 2

Period of $\sin(ax + b) = \frac{2\pi}{|a|}$

$\therefore$ Period of $\sin 2x = \frac{2\pi}{|2|} = \pi.$