Questions in trigonometry

Select	Question
	Period of $\sin \theta -\sqrt{3}\cos \theta $ is
	Period of $\sin \frac{x}{2}-\cos \frac{x}{3}$ is
	Period of cot $3x-\cos (4x+3)$ is
	Period of $\|2\sin 3\theta +4\cos 3\theta \|$ is
	The period of ${{\sin }^{4}}x+{{\cos }^{4}}x$ is
	The period of the function $f(\theta )=\sin \frac{\theta }{3}+\cos \frac{\theta }{2}$ is
	If the period of the function $f(x)=\sin \left( \frac{x}{n} \right)$ is $4\pi $ , then $n$ is equal to
	Period of ${{\sin }^{2}}x$ is
	The period of the function $y=\sin 2x$ is
	Which of the following functions has period $2\pi $