acosl man page on Scientific

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```ACOS(3)			   Linux Programmer's Manual		       ACOS(3)

NAME
acos, acosf, acosl - arc cosine function

SYNOPSIS
#include <math.h>

double acos(double x);
float acosf(float x);
long double acosl(long double x);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

acosf(), acosl(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600
|| _ISOC99_SOURCE; or cc -std=c99

DESCRIPTION
The acos() function calculates the arc cosine of x; that is  the	 value
whose cosine is x.

RETURN VALUE
On  success, these functions return the arc cosine of x in radians; the
return value is in the range [0, pi].

If x is a NaN, a NaN is returned.

If x is +1, +0 is returned.

If x is positive infinity or negative infinity, a domain error  occurs,
and a NaN is returned.

If  x is outside the range [-1, 1], a domain error occurs, and a NaN is
returned.

ERRORS
See math_error(7) for information on how to determine whether an	 error
has occurred when calling these functions.

The following errors can occur:

Domain error: x is outside the range [-1, 1]
errno  is	 set  to  EDOM.	  An  invalid floating-point exception
(FE_INVALID) is raised.

CONFORMING TO
C99, POSIX.1-2001.  The variant returning double also conforms to SVr4,
4.3BSD, C89.

asin(3), atan(3), atan2(3), cacos(3), cos(3), sin(3), tan(3)

COLOPHON
This  page  is  part of release 3.22 of the Linux man-pages project.  A
description of the project, and information about reporting  bugs,  can
be found at http://www.kernel.org/doc/man-pages/.

2008-08-05			       ACOS(3)
```
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