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man:asinf

ASIN(3) Linux Programmer's Manual ASIN(3)

NAME

     asin, asinf, asinl - arc sine function

SYNOPSIS

     #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():
         _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
             || /* Since glibc 2.19: */ _DEFAULT_SOURCE
             || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

DESCRIPTION

     These  functions  calculate  the  principal value of the arc sine of x;
     that is the value whose sine is x.

RETURN VALUE

     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.

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.

ATTRIBUTES

     For  an  explanation  of  the  terms  used   in   this   section,   see
     attributes(7).
     allbox;  lbw24  lb  lb  l  l  l.   Interface Attribute Value T{ asin(),
     asinf(), asinl() T}   Thread safety  MT-Safe

CONFORMING TO

     C99, POSIX.1-2001, POSIX.1-2008.
     The variant returning double also conforms to SVr4, 4.3BSD, C89.

SEE ALSO

     acos(3), atan(3), atan2(3), casin(3), cos(3), sin(3), tan(3)

COLOPHON

     This page is part of release 4.16 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
     https://www.kernel.org/doc/man-pages/.
                                2017-09-15                           ASIN(3)
/data/webs/external/dokuwiki/data/pages/man/asinf.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

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