Trig Identities

$$\frac{\tan\ A+\tan B}{1-\tan A\tan B}$$  

$$\frac{\tan A-\tan B}{1+\tan A\tan B}$$  

$$\frac{2\tan A-1}{\tan A\tan B}$$  

$$\frac{2\tan A+1}{\tan A\tan B}$$  

$$\sin\alpha\cos\alpha+\sin\beta\cos\beta$$  

$$\sin\alpha\cos\alpha-\sin\beta\cos\beta$$  

$$\sin\alpha\cos\beta+\cos\alpha\sin\beta$$  

$$\sin\alpha\cos\beta-\cos\alpha\sin\beta$$  

$$\cos\alpha\cos\beta+\sin\alpha\sin\beta$$  

$$\cos\alpha\cos\beta-\sin\alpha\sin B$$  

$$\cos\alpha\sin\beta+\sin\alpha\cos\beta$$  

$$\cos\alpha\sin\beta-\sin\alpha\cos\beta$$  

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

$$\frac{-\sqrt{2}-\sqrt{6}}{4}$$

$$\frac{\sqrt{2}+\sqrt{6}}{4}$$

$$2-\sqrt{3}$$

0.2588

0.9218

$$\frac{\sqrt{6}-\sqrt{2}}{4}$$  

$$\frac{\sqrt{2}-\sqrt{6}}{4}$$  

1/sin(x)

1/tan(x)

sin(x)

1/cos(x)