$x=\frac{\pi}{2}+n\pi$

$x=\frac{\pi}{4}+\frac{n\pi}{2}$

$x=2n\pi$

$x=\frac{\pi}{2}$

$x=\frac{\pi}{4}$

$x=2\pi$

$x=4n\pi$

$x=\frac{\pi}{6}+\frac{n\pi}{3}$

$x=\frac{3\pi}{2}+3n\pi$

$x=\frac{\pi}{2}+n\pi$

$x=\frac{n\pi}{3}$

$x=\pi+2n\pi$

$x=3n\pi$

$x=\frac{\pi}{6}+\frac{n\pi}{3}$

$x=\frac{3\pi}{2}+3n\pi$

$x=\frac{\pi}{2}+n\pi$

$x=\frac{n\pi}{3}$

$x=\pi+2n\pi$

$x=\frac{\pi}{2}+n\pi$

$x=\frac{n\pi}{2}$

$x=\pi+2n\pi$

$x=\frac{\pi}{2}+n\pi$

$x=\frac{\pi}{6}+\frac{n\pi}{3}$

$x=3n\pi$

$x=\frac{\pi}{2}+n\pi$

$x=\frac{n\pi}{2}$

$x=\pi+2n\pi$

$x=4n\pi$

$x=\frac{\pi}{6}+\frac{n\pi}{3}$

$x=\frac{3\pi}{2}+3n\pi$