![Since $\tan(25\pi/2)$ is undefined, and $\cot x = \frac{1}{\tan x}$, then why isn't $\cot(25\pi/2)$ undefined instead of $0$? - Mathematics Stack Exchange Since $\tan(25\pi/2)$ is undefined, and $\cot x = \frac{1}{\tan x}$, then why isn't $\cot(25\pi/2)$ undefined instead of $0$? - Mathematics Stack Exchange](https://i.stack.imgur.com/PLJhQ.gif)
Since $\tan(25\pi/2)$ is undefined, and $\cot x = \frac{1}{\tan x}$, then why isn't $\cot(25\pi/2)$ undefined instead of $0$? - Mathematics Stack Exchange
![Graphing Cotangent, Cosecant, Secant, and Tangent | Graphing, Positive numbers, Trigonometric functions Graphing Cotangent, Cosecant, Secant, and Tangent | Graphing, Positive numbers, Trigonometric functions](https://i.pinimg.com/736x/cd/06/82/cd0682dd8cc25073d20cc1720a9785ff.jpg)
Graphing Cotangent, Cosecant, Secant, and Tangent | Graphing, Positive numbers, Trigonometric functions
![Since $\tan(25\pi/2)$ is undefined, and $\cot x = \frac{1}{\tan x}$, then why isn't $\cot(25\pi/2)$ undefined instead of $0$? - Mathematics Stack Exchange Since $\tan(25\pi/2)$ is undefined, and $\cot x = \frac{1}{\tan x}$, then why isn't $\cot(25\pi/2)$ undefined instead of $0$? - Mathematics Stack Exchange](https://i.stack.imgur.com/tFfsY.gif)