.\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
.\" <mtk.manpages@gmail.com>
.\"
+.\" %%%LICENSE_START(VERBATIM)
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.\" References consulted:
.\" Linux libc source code
.BR atanh ()
function calculates the inverse hyperbolic tangent of
\fIx\fP; that is the value whose hyperbolic tangent is \fIx\fP.
-.SH "RETURN VALUE"
+.SH RETURN VALUE
On success, these functions return the inverse hyperbolic tangent of
.IR x .
A divide-by-zero floating-point exception
.RB ( FE_DIVBYZERO )
is raised.
-.SH "CONFORMING TO"
+.SH CONFORMING TO
C99, POSIX.1-2001.
The variant returning
.I double
instead of the POSIX-mandated
.BR ERANGE .
Since version 2.10, glibc does the right thing.
-.SH "SEE ALSO"
+.SH SEE ALSO
.BR acosh (3),
.BR asinh (3),
.BR catanh (3),