NAME
asind(), asindf() — degree-valued arcsine functions
SYNOPSIS
#include <math.h>
double asind(double x);
float asindf(float x);
DESCRIPTION
asind()
is a degree-valued version of the
asin()
function. It returns the 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.
asind()
and
asindf()
are not specified by any standard, but
asindf()
is named in accordance with the conventions
specified in the "Future Library Directions" section of the
ANSI C standard.
To use these functions, compile either with the default
-Ae
option or with the
-Aa
and
-D_HPUX_SOURCE
options. Make sure your program includes
<math.h>.
Link in the math library by specifying
-lm
on the compiler or linker command line.
RETURN VALUE
If
x
is NaN,
asind()
returns NaN.
If the magnitude of
x
is greater than one,
asind()
returns NaN and sets
errno
to [EDOM].
ERRORS
If
asind()
fails,
errno
is set to the following value.
- [EDOM]
The magnitude of
x
is greater than one.
