Trigonometric Functions

$$0$$  

$$1$$  

$$Undefined$$  

$$\pi$$  

$$0$$  

$$1$$  

$$-1$$  

undefined

$$\tan\ \frac{\pi}{2}=0$$  

$$\tan\ \frac{\pi}{2}=1$$  

$$\tan\ \frac{\pi}{2}=-1$$  

$$\tan\ \frac{\pi}{2}=undefined$$  

$$\csc\ \frac{\pi}{2}=0$$  

$$\csc\ \frac{\pi}{2}=1$$  

$$\csc\ \frac{\pi}{2}=undefined$$  

$$\sec\ \frac{\pi}{2}=undefined$$  

$$\sec\ \frac{\pi}{2}=1$$  

$$\sec\ \frac{\pi}{2}=0$$  

$$\cot\ \frac{\pi}{2}=1$$  

$$\cot\ \frac{\pi}{2}=0$$  

$$\cot\ \frac{\pi}{2}=undefined$$  

$$\sin\pi$$  

$$\cos\pi$$  

$$\tan\pi$$  

$$\sec\ \pi$$  

$$\csc\ \pi$$  

$$\sin\pi$$  

$$\cot\pi$$  

$$\cos\pi$$  

$$\sec\pi$$  

$$\cos\pi$$

$$\cot\ \pi$$

$$\tan\pi$$

$$\sec\ \frac{3\pi}{2}$$  

$$\csc\ \frac{3\pi}{2}$$  

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