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);

DESCRIPTION
       The  asin()  function calculates the arc sine of x; that
       is the value whose sine is x.  If x  falls  outside  the
       range -1 to 1, asin() fails and errno is set.

RETURN VALUE
       The  asin() function returns the arc sine in radians and
       the value is mathematically defined to be between  -PI/2
       and PI/2 (inclusive).

ERRORS
       EDOM   x is out of range.

CONFORMING TO
       SVID  3,  POSIX,  BSD 4.3, ISO 9899.  The float and long
       double variants are C99 requirements.

SEE ALSO
       acos(3), atan(3), atan2(3), cos(3), sin(3), tan(3)



                           2002-07-25                   ASIN(3)
