$х=\frac{\pi}{4}+2\pi n,\ n\epsilon Z$

$х=\frac{\pi}{4}+\frac{\pi n}{2},\ n\epsilon Z$

$х=-\frac{\pi}{4}+\frac{\pi n}{2},\ n\epsilon Z$

$х=\frac{2\pi}{3}+2\pi n,\ n\epsilon Z$

$х=-\frac{2\pi}{3}+2\pi n,\ n\epsilon Z$

$х=\pm\frac{2\pi}{3}+2\pi n,\ n\epsilon Z$

$х=\pm\frac{2\pi}{3}+\pi n,\ n\epsilon Z$

$х=\pm\frac{\pi}{6}+2\pi n,\ n\epsilon Z$

$х=\frac{\pi}{6}+2\pi n,\ n\epsilon Z$

$х=\frac{\pi n}{6},\ n\epsilon Z$

$х=\pm\frac{\pi}{3}+2\pi n,\ n\epsilon Z$

$х=\frac{\pi}{3}+\pi n,\ n\epsilon Z$

$х=\pm\frac{\pi}{3}+\pi n,\ n\epsilon Z$

$х=\pi n,\ n\epsilon Z$

$х=\frac{\pi}{6}+\pi n,\ n\epsilon Z$

$х=2\pi+\pi n,\ n\epsilon Z$

$х=\frac{\pi}{4}+2\pi n,\ х=ar\operatorname{ctg}2+\pi k,\ k,n\epsilon Z$

$х=\frac{\pi}{4}+\pi n,\ х=-ar\operatorname{ctg}2+\pi k,\ \ n,k\epsilon Z$

$х=\frac{\pi}{4}+2\pi k,\ х=-ar\operatorname{ctg}2+\pi k,\ k\epsilon Z$

$х=ar\operatorname{ctg}2+\pi k,\ k\epsilon Z$

$х=-ar\operatorname{ctg}\ \frac{2}{3}+\pi k,\ k\epsilon Z$

$х=ar\operatorname{ctg}\ \frac{2}{3}+\pi k,\ k\epsilon Z$

$х=ar\operatorname{ctg}3+\pi n,\ х=ar\operatorname{ctg}2+\pi k,\ k,n\epsilon Z$

$х=-ar\operatorname{ctg}3+\pi n,\ х=-ar\operatorname{ctg}2+\pi k,\ k,n\epsilon Z$

$х=-ar\operatorname{ctg}3+\pi n,\ х=ar\operatorname{ctg}2+\pi k,\ k,n\epsilon Z$

$х=-ar\operatorname{ctg}3+\pi n,\ х=ar\operatorname{ctg}\ \frac{1}{2}+2\pi n,\ n\epsilon Z$

$х=-ar\operatorname{ctg}3+\pi n,\ х=ar\operatorname{ctg}\frac{1}{2}+\pi n,\ n\epsilon Z$

нет корней

$х=\frac{\pi}{16}+\frac{\pi n}{4},\ х=\frac{\pi}{4}+\pi n,\ n\in Z$

$х=\frac{\pi}{4}+\frac{\pi n}{4},\ х=\frac{\pi}{4}+\pi n,\ n\in Z$

нет корней

$х=\pi n,\ n\in Z$

$х=\frac{\pi n}{2},\ n\in Z$