Arccsch
From specialfunctionswiki
The function $\mathrm{arccsch} \colon \mathbb{R} \setminus \{0\} \rightarrow \mathbb{R} \setminus \{0\}$ is the inverse function of the hyperbolic cosecant.
The function $\mathrm{arccsch} \colon \mathbb{R} \setminus \{0\} \rightarrow \mathbb{R} \setminus \{0\}$ is the inverse function of the hyperbolic cosecant.