acosh
Inverse Hyperbolic Trigonometric Functions

### Description

Performs inverse hyperbolic trigonometric transformations on real or complex numbers.

### Usage

    acosh(x)
    asinh(x)
    atanh(x)

### Arguments

x | a numeric or a complex object. Missing values (NAs) are allowed.

### Details

Numeric arguments must be at least 1 for acosh and must be less than 1 in absolute value for atanh. Otherwise, NaN is returned. Complex arguments are unrestricted.
These functions are part of the Math group of generic functions.
Value
returns data transformed by the specified inverse hyperbolic trigonometric function, with attributes preserved.
See Also
acos, cosh, cos.
Examples

    acosh(1.5)
    asinh(0.5)
    atanh(1.5)
    atanh(1.5 + 0i)

Package base version 6.1.5-18
Package Index