## Trigonometry (11th Edition) Clone

The least positive number for which $y = cot~x$ is undefined is $x = \pi$
We can find the least positive number for which $y = cot~x$ is undefined: $cot~x = \frac{cos~x}{sin~x}$ $cot~x$ is undefined when $sin~x = 0$. The least positive number for which $sin~x = 0$ is $x = \pi$ The least positive number for which $y = cot~x$ is undefined is $x = \pi$