SW5: Trigonometric Identities, Trigonometric Equations

$$\sin\frac{3\pi}{4}\cos\frac{2\pi}{3}+\cos\frac{3\pi}{4}\sin\frac{2\pi}{3}$$

$$\sin\frac{3\pi}{4}\cos\frac{2\pi}{3}-\cos\frac{3\pi}{4}\sin\frac{2\pi}{3}$$

$$\cos\frac{3\pi}{4}\cos\frac{2\pi}{3}+\sin\frac{3\pi}{4}\sin\frac{2\pi}{3}$$

$$\cos\frac{3\pi}{4}\cos\frac{2\pi}{3}-\sin\frac{3\pi}{4}\sin\frac{2\pi}{3}\$$

$$\sin\frac{3\pi}{4}\cos\frac{2\pi}{3}+\cos\frac{3\pi}{4}\sin\frac{2\pi}{3}$$

$$\sin\frac{3\pi}{4}\cos\frac{2\pi}{3}-\cos\frac{3\pi}{4}\sin\frac{2\pi}{3}$$

$$\cos\frac{3\pi}{4}\cos\frac{2\pi}{3}+\sin\frac{3\pi}{4}\sin\frac{2\pi}{3}$$

$$\cos\frac{3\pi}{4}\cos\frac{2\pi}{3}-\sin\frac{3\pi}{4}\sin\frac{2\pi}{3}\$$

$$2+\sqrt{3}$$

$$2-\sqrt{3}$$

$$-2-\sqrt{3}$$

$$-2+\sqrt{3}$$

$$\frac{\sqrt{3}}{2}$$

$$-\frac{\sqrt{3}}{2}$$

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

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

$$\frac{\sqrt{2+\sqrt{2}}}{2}$$

$$\frac{\sqrt{2-\sqrt{2}}}{2}$$

$$\frac{\sqrt{-2-\sqrt{2}}}{2}$$

$$\frac{\sqrt{-2+\sqrt{2}}}{2}$$

$$\frac{\sqrt{2+\sqrt{2}}}{2}$$

$$\frac{\sqrt{2-\sqrt{2}}}{2}$$

$$\frac{\sqrt{-2-\sqrt{2}}}{2}$$

$$\frac{\sqrt{-2+\sqrt{2}}}{2}$$