Questions in trigonometry

Select	Question
	$\sqrt{\frac{1-\sin A}{1+\sin A}}=$
	$\frac{\sin 3\theta -\cos 3\theta }{\sin \theta +\cos \theta }+1=$
	The value of $\tan 7\frac{1}{2}{}^\circ $ is equal to
	If $\theta $is an acute angle and $\sin \frac{\theta }{2}=\sqrt{\frac{x-1}{2x}}$, then $\tan \theta $ is equal to
	The value of $a\cos \theta +b\sin \theta $lies between
	The maximum value of $3\cos \theta -4\sin \theta $ is
	Minimum value of $5{{\sin }^{2}}\theta +4{{\cos }^{2}}\theta $is
	The maximum value of ${{\cos }^{2}}\left( \frac{\pi }{3}-x \right)-{{\cos }^{2}}\left( \frac{\pi }{3}+x \right)$ is
	${{\tan }^{2}}\theta +{{\cot }^{2}}\theta $is
	The value of x for the maximum value of $\sqrt{3}\cos x+\sin x$is