Đề CK I 11

0

$$\pi$$

$$\frac{\pi}{2}$$

$$\frac{\pi}{4}$$

$$\frac{3\pi}{2}$$

0

$$\frac{\pi}{2}$$

$$\frac{\pi}{4}$$

$$x=\alpha+k\pi,\ k\epsilon Z$$

$$x=\alpha+k2\pi,\ k\epsilon Z$$

$$x=\pm\alpha+k\pi,\ k\epsilon Z$$

$$x=\pi-\alpha+k\pi,\ k\epsilon Z$$

$$x=\alpha+k\pi,\ k\epsilon Z$$

$$x=\alpha+k2\pi,\ k\epsilon Z$$

$$x=\pm\alpha+k\pi,\ k\epsilon Z$$

$$x=\pi-\alpha+k\pi,\ k\epsilon Z$$

$$\tan\alpha=-\frac{12}{5}$$

$$\tan\alpha=\frac{5}{12}$$

$$\tan\alpha=-\frac{5}{12}$$

$$\tan\alpha=\frac{12}{5}$$

$$\frac{\sqrt[]{21}}{3}$$

$$-\frac{\sqrt[]{21}}{5}$$

$$\frac{\sqrt[]{21}}{5}$$

$$-\frac{\sqrt[]{21}}{2}$$

$$\cot\alpha=2$$

$$\cot\alpha=\frac{1}{4}$$

$$\cot\alpha=\frac{1}{2}$$

$$\cot\alpha=\sqrt[]{2}$$

$$x=\frac{\pi}{6}+\frac{k\pi}{3},\ x=\frac{\pi}{2}+k2\pi,\ k\epsilon Z$$

$$x=\frac{\pi}{6}+\frac{k\pi}{3},\ x=\frac{\pi}{3}+k2\pi,\ k\epsilon Z$$

$$x=\frac{\pi}{6}+k2\pi,\ x=\frac{\pi}{2}+k2\pi,\ k\epsilon Z$$

$$x=\frac{\pi}{6}+\frac{k2\pi}{3},\ x=\frac{\pi}{2}+k2\pi,\ k\epsilon Z$$

$$x=k\pi,\ x=k\frac{\pi}{2},\ k\epsilon Z$$

$$x=\frac{\pi}{8}+k\frac{\pi}{2},\ x=\frac{\pi}{4}+k\pi,\ k\epsilon Z$$

$$x=k2\pi,\ x=\frac{\pi}{2}+k2\pi,\ k\epsilon Z$$

$$x=k\pi,\ x=\frac{\pi}{4}+k\pi,\ k\epsilon Z$$

$$x=-\frac{\pi}{6}+k2\pi,\ x=-\frac{7\pi}{6}+k2\pi,\ k\epsilon Z$$

$$x=-\frac{\pi}{6}+k2\pi,\ x=\frac{7\pi}{6}+k2\pi,\ k\epsilon Z$$

$$x=\frac{\pi}{6}+k2\pi,\ x=\frac{5\pi}{6}+k2\pi,\ k\epsilon Z$$

$$x=\frac{\pi}{6}+k2\pi,\ x=-\frac{7\pi}{6}+k2\pi,\ k\epsilon Z$$