Modern Math Atanh

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Atanh

Returns the inverse hyperbolic tangent of a number between -1 and 1.

Syntax

Atanh( x )

Notes

• 1 and -1 give infinity; outside them the result is NaN.
• The inverse of Tanh.
• Overloaded on float64 and on float32: a single-precision argument takes the single-precision path and does not widen.
• BOUNDED accuracy: correct to the platform library's stated ulp bound.

Examples

#import "std/numeric"
using numeric

print Atanh( 0.5 )           '' 0.5493061443340549
print Atanh( 1.0 )           '' 1.#INF

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Library: Math Library
Category: Math Library
Documented under: The libm surface