Question

Period of $5+3\cos (\pi x+\frac{\pi }{4})$ is

• A. $2$
• B. $5$
• C. $6$
• D. none of the above

Answer 1

The correct option is A $2$

We know that, period of $a+b\cos (mx+n)$ is $\frac{2\pi }{|m|}.$
$\therefore$ Period of $5+3\cos (\pi x+\frac{\pi }{4})$ is $\frac{2\pi }{\pi }=2$