NAME
asind(), asindf(), asindl(), asindw(), asindq() — degree-valued arcsine functions
SYNOPSIS
#include <math.h>
double asind(double x);
float asindf(float x);
HP Integrity Server Only
long double asindl(long double x);
extended asindw(extended x);
quad asindq(quad x);
DESCRIPTION
asind()
returns the degree-valued arcsine of
x,
in the range -90 to 90.
asindf()
is a
float
version of
asind();
it takes a
float
argument and returns a
float
result.
Integrity Server Only
asindl()
is a
long double
version of
asind();
it takes a
long double
argument and returns a
long double
result.
asindw()
is an
extended
version of
asind();
it takes an
extended
argument and returns an
extended
result.
asindq()
is equivalent to
asindl()
on HP-UX systems.
USAGE
To use these functions,
compile either with the default
-Ae
option or with the
-Aa
and
-D_HPUX_SOURCE
options.
To use (for Integrity servers)
asindw()
or
asindq(),
compile also with the
-fpwidetypes
option.
To use any of these functions, make sure your program includes
<math.h>,
and link in the math library by specifying
-lm
on the compiler or linker command line.
For more information, see the
HP-UX floating-point guide for HP Integrity servers
at the following site:
http://www.hp.com/go/fp.
RETURN VALUE
asind(±0)
returns ±0.
If the magnitude of
x
is greater than one,
asind()
returns NaN and raises the invalid exception.
If
x
is NaN,
asind()
returns NaN.
ERRORS
If the magnitude of
x
is greater than one,
asind()
sets
errno
to [EDOM].
Integrity Server
HP-UX
libm
functions on Integrity server do not set
errno
by default. For
errno
setting, compile with the
+Olibmerrno
option.
STANDARDS CONFORMANCE
These functions are not specified by any standard.
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