Arccot
From specialfunctionswiki
The function $\mathrm{arccot} \colon \mathbb{R} \rightarrow \left( - \dfrac{\pi}{2}, \dfrac{\pi}{2} \right] \setminus \{0\}$ is the inverse function of the cotangent function.
Domain coloring of $\mathrm{arccot}$.
Properties
References
Which is the correct graph of arccot x?