cosh(x) = (exp(x) + exp(\-x)) / 2
.fi
-.SH "RETURN VALUE"
+.SH RETURN VALUE
On success, these functions return the hyperbolic cosine of
.IR x .
An overflow floating-point exception
.RB ( FE_OVERFLOW )
is raised.
-.SH "CONFORMING TO"
+.SH CONFORMING TO
C99, POSIX.1-2001.
The variant returning
.I double
an overflow floating-point
.RB ( FE_OVERFLOW )
exception is not raised when an overflow occurs.
-.SH "SEE ALSO"
+.SH SEE ALSO
.BR acosh (3),
.BR asinh (3),
.BR atanh (3),