# ArcCsch

ArcCsch[z]

gives the inverse hyperbolic cosecant of the complex number .

# Details • Mathematical function, suitable for both symbolic and numerical manipulation.
• For certain special arguments, ArcCsch automatically evaluates to exact values.
• ArcCsch can be evaluated to arbitrary numerical precision.
• ArcCsch automatically threads over lists.
• ArcCsch[z] has a branch cut discontinuity in the complex plane running from to .

# Background & Context

• ArcCsch is the inverse hyperbolic cosecant function. For a real number , ArcCsch[x] represents the hyperbolic angle measure such that .
• ArcCsch automatically threads over lists. For certain special arguments, ArcCsch automatically evaluates to exact values. When given exact numeric expressions as arguments, ArcCsch may be evaluated to arbitrary numeric precision. Operations useful for manipulation of symbolic expressions involving ArcCsch include FunctionExpand, TrigToExp, TrigExpand, Simplify, and FullSimplify.
• ArcCsch is defined for complex argument by . ArcCsch[z] has a branch cut discontinuity in the complex plane.
• Related mathematical functions include Csch, ArcSech, and ArcCsc.

# Examples

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## Basic Examples(6)

Evaluate numerically:

Plot over a subset of the reals:

Plot over a subset of the complexes:

Series expansion at the origin:

Asymptotic expansion at Infinity:

Asymptotic expansion at a singular point:

## Scope(37)

### Numerical Evaluation(6)

Evaluate numerically:

Evaluate to high precision:

The precision of the output tracks the precision of the input:

Evaluate for complex arguments:

Evaluate ArcCsch efficiently at high precision:

ArcCsch can deal with real-valued intervals:

ArcCsch threads elementwise over lists and matrices:

### Specific Values(4)

Values of ArcCsch at fixed points:

Values at infinity:

Singular point of ArcCsch:

Find the value of satisfying equation :

Substitute in the value:

Visualize the result:

### Visualization(3)

Plot the ArcCsch function:

Plot the real part of :

Plot the imaginary part of :

Polar plot with :

### Function Properties(5)

ArcCsch is defined for all real values except 0:

Complex domain:

ArcCsch achieves all real values except 0:

Function range for arguments from the complex domain:

ArcCsch is an odd function:

ArcCsch has the mirror property :

### Differentiation(3)

First derivative:

Higher derivatives:

Formula for the  derivative:

### Integration(3)

Indefinite integral of ArcCsch:

Definite integral of ArcCsch over the interval centered at the origin is 0:

More integrals:

### Series Expansions(3)

Find the Taylor expansion using Series:

Plot the first three approximations for ArcCsch around :

Find series expansions at branch points and branch cuts:

Apply ArcCsch to a power series:

### Integral Transforms(2)

Compute the Mellin transform using MellinTransform:

### Function Identities and Simplifications(3)

Simplification of ArcCsch:

Use TrigToExp to express in terms of logarithm:

Convert back:

Expand assuming real variables and :

### Function Representations(5)

Represent using ArcSinh:

Representation through inverse Jacobi functions:

Represent using Hypergeometric2F1:

ArcCsch can be represented in terms of MeijerG:

ArcCsch can be represented as a DifferentialRoot:

## Applications(1)

Branch cut structure of ArcCsch runs along the imaginary axis:

## Properties & Relations(2)

Compose with the inverse function:

Use PowerExpand to disregard multivaluedness of the ArcCsch: