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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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