atanhf3
Inverse hyperbolic tangent functions
Part of atanh(3).
Usage
double
float
long double
Library
Math Library (libm, -lm)
Overview
The atanh(), atanhf(), and atanhl() functions compute the inverse hyperbolic tangent of the real argument x. For a discussion of error due to roundoff, see math(3).
Return values
These functions return the inverse hyperbolic tangent of x if successful. If the argument has absolute value 1, a divide-by-zero exception is raised and an infinity is returned. If |x| > 1, an invalid exception is raised and an is returned.
History
- FreeBSD 16.0-CURRENT (2026-10-27) to FreeBSD 15.0-RELEASE: the text shown here
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