Trigonometry - Identities and double angle formulas

 $0,\ \frac{2\pi}{3},\ \frac{4\pi}{3},\ 2\pi$  

 $\frac{5\pi}{6},\ \frac{7\pi}{6}$  

 $\frac{\pi}{3},\ \frac{5\pi}{3}$  

 $\frac{\pi}{4},\frac{3\pi}{4},\ \frac{5\pi}{4}$  

 $\frac{10}{12}$  

 $-\frac{5\sqrt{11}}{18}$  

 $-\frac{7}{18}$  

 $-\frac{10}{12}$  

 $-\frac{4\sqrt{21}}{25}$  

 $\frac{4\sqrt{21}}{25}$  

 $\frac{4\sqrt{3}}{5}$  

 $-\frac{4\sqrt{3}}{5}$  

 $0$  

 $2\tan\theta$  

 $\frac{1}{\cos\ \theta}$  

 $\tan\theta$  

0

 $0,\ \frac{\pi}{3},\ \pi,\ \frac{5\pi}{3},\ 2\pi$  

 $0,\ 2\pi$  

 $0,\ \frac{\pi}{6},\frac{11\pi}{6},\ 2\pi$  

 $\pm\frac{\pi}{12},\pm\frac{5\pi}{12}$  

 $-\frac{7\pi}{6},-\frac{11\pi}{6},\frac{\pi}{6},\ \frac{5\pi}{6}$  

 $\pm\frac{\pi}{6},\pm\frac{5\pi}{6}$  

 $-\frac{11\pi}{12},-\frac{7\pi}{12},\frac{\pi}{12},\frac{5\pi}{12}$  

 $-\frac{7}{24}$  

 $\frac{24}{7}$  

 $\frac{7}{24}$  

 $-\frac{24}{7}$  

 $5$  

18

13

 $13\sin^2\ \theta\ +\ 24\sin\theta\cos\theta+13\cos^2\ \theta$  

 $\frac{5}{9}$  

 $\frac{7}{3}$  

 $\frac{1}{9}$  

 $\frac{8}{9}$  

 $-\frac{1}{2}$  

 $1$  

 $\frac{1}{2}$  

 $\frac{3}{2}$