Identities, Trigonometric equations and Vectors REvision

$$\sin\ 90^{o\ }$$  

$$\sin\ 60^{o\ }$$  

$$\cos\ 90^{o\ }$$  

$$\cos\ 60^{o\ }$$  

$$2\sin\ 100^{o\ }$$  

$$\sin^2\ 50^{o\ }$$  

$$\cos^2100^{o\ }$$  

$$\cos100^{o\ }$$  

$$\sin\left(\frac{11\pi}{5}\right)$$

$$\cos\left(\frac{11\pi}{5}\right)$$

$$\sin\left(\frac{\pi}{15}\right)$$

$$\cos\left(\frac{\pi}{15}\right)$$

$$\tan75^o$$  

$$\tan\ 15^o$$  

$$\frac{\sin45^o}{\cos30^o}$$  

$$\tan90^{o\ }$$  

$$\frac{\sqrt{6}+\sqrt{2}}{4}$$  

$$\frac{\sqrt{6}-\sqrt{2}}{4}$$  

$$\frac{-\sqrt{6}-\sqrt{2}}{4}$$  

$$\frac{\sqrt{2}-\sqrt{6}}{4}$$  

$$\frac{\sqrt{6}+\sqrt{2}}{4}$$  

$$\frac{\sqrt{6}-\sqrt{2}}{4}$$  

$$\frac{\sqrt{2}-\sqrt{6}}{4}$$  

$$-\frac{\sqrt{3}}{2}$$  

$$\frac{4\sqrt{3}+3}{10}$$  

$$\frac{4\sqrt{3}-3}{10}$$

$$\frac{2\sqrt{5}+12}{15}$$  

$$\frac{4\sqrt{5}+2}{5}$$  

$$\sin\left(\frac{30\degree}{2}\right)$$  

$$\cos\left(\frac{30\degree}{2}\right)$$

$$\sin\left(\frac{15\degree}{2}\right)$$  

$$\cos\left(\frac{15\degree}{2}\right)$$  

$$\sqrt{2}$$  

$$\sqrt{3}$$  

$$\frac{\sqrt{3}}{3}$$  

$$\frac{\sqrt{2}}{2}$$  

$$4\sin15^o$$  

$$4\cos60^o$$  

$$4\sin60^o$$  

$$4\cos15^o$$