The period of $|\cos x|$ is

The period of $\left(\tan \theta - \frac{1}{3} \tan^3 \theta\right) \left(\frac{1}{3} - \tan^2 \theta\right)^{-1}$,where $\tan^2 \theta \neq \frac{1}{3}$,is

The period of $\sin \theta - \sqrt{3} \cos \theta$ is

The period of $\cos(7x - 5)$ is

The period of $f(x) = x - [x]$,if it is periodic,is

Let $f(x) = \cos(ax) + \sin(x)$ be a periodic function. Then $a$ must be