ACOSH
Section: C Library Functions (3)
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BSD mandoc
BSD 4.3
NAME
acosh
- inverse hyperbolic cosine function
SYNOPSIS
Fd #include <math.h>
Ft double
Fn acosh double x
DESCRIPTION
The
Fn acosh
function computes the inverse hyperbolic cosine
of the real
argument
x
For a discussion of error due to roundoff, see
math(3).
RETURN VALUES
The
Fn acosh
function
returns the inverse hyperbolic cosine of
x
On the
VAX
and
Tahoe
if the argument is less than one
Fn acosh
sets the global variable
errno
to
Er EDOM
and
causes a reserved operand fault.
SEE ALSO
asinh(3),
atanh(3),
exp(3),
infnan(3)
math(3),
HISTORY
The
Fn acosh
function appeared in
BSD 4.3
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUES
-
- SEE ALSO
-
- HISTORY
-
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