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man ATANH (3) | C library functions | Unix Manual Pages | :man▋
NAME
atanh, atanhf - inverse hyperbolic tangent functions
CONTENTS
Library
Synopsis
Description
Return Values
See Also
History
LIBRARY
.Lb libm
SYNOPSIS
.In math.h double atanh "double x" float atanhf "float x"
DESCRIPTION
The atanh and the atanhf functions compute the inverse hyperbolic tangent of the real argument x. For a discussion of error due to roundoff, see math(3).
RETURN VALUES
The atanh and the atanhf 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 NaN is returned.
SEE ALSO
acosh(3), asinh(3), exp(3), fenv(3), math(3)
HISTORY
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