ASIN(3) manual page
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asin, asinf, asinl - arc sine function
#include <math.h>
double asin(double x);
float asinf(float x);
long double asinl(long double x);
Link with -lm.
Feature Test Macro Requirements
for glibc (see feature_test_macros(7)
):
asinf(), asinl():
_BSD_SOURCE
|| _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or cc -std=c99
The asin() function calculates the principal value
of the arc sine of x; that is the value whose sine is x.
On
success, these functions return the principal value of the arc sine of
x in radians; the return value is in the range [-pi/2, pi/2].
If x is a NaN,
a NaN is returned.
If x is +0 (-0), +0 (-0) is returned.
If x is outside
the range [-1, 1], a domain error occurs, and a NaN is returned.
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.
C99, POSIX.1-2001. The variant
returning double also conforms to SVr4, 4.3BSD, C89.
acos(3)
, atan(3)
,
atan2(3)
, casin(3)
, cos(3)
, sin(3)
, tan(3)
This page is part of
release 3.78 of the Linux man-pages project. A description of the project,
information about reporting bugs, and the latest version of this page,
can be found at http://www.kernel.org/doc/man-pages/.
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