Let $f(x) = \cos \sqrt {x,} $ then which of the following is true
Let $f(x) = \cos \sqrt {x,} $ then which of the following is true
- A
$f(x)$ is periodic with period $\sqrt 2 \pi $
- B
$f(x)$ is periodic with period $\sqrt \pi $
- C
$f(x)$ is periodic with period $4{\pi ^2}$
- D
$f(x)$ is not a periodic function
Similar Questions
Let $S\, = \,\left\{ {\theta \, \in \,[ - \,2\,\pi ,\,\,2\,\pi ]\, :\,2\,{{\cos }^2}\,\theta \, + \,3\,\sin \,\theta \, = \,0} \right\}$. Then the sum of the elements of $S$ is
Let $S\, = \,\left\{ {\theta \, \in \,[ - \,2\,\pi ,\,\,2\,\pi ]\, :\,2\,{{\cos }^2}\,\theta \, + \,3\,\sin \,\theta \, = \,0} \right\}$. Then the sum of the elements of $S$ is
- [JEE MAIN 2019]
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