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RedHat 9 (Linux i386) - man page for asin (redhat section 3)

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

NAME
       asin - arc sine function

SYNOPSIS
       #include <math.h>

       double asin(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

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

					    1993-06-08					  ASIN(3)


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