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

NAME
     asin, asinf - arc sine functions

SYNOPSIS
     #include <math.h>

     double
     asin(double x);

     float
     asinf(float x);

DESCRIPTION
     The asin() and the asinf() functions compute the principal value of the
     arc sine of x in the range [-pi/2, +pi/2] radians.	 For a discussion of
     error reporting, see math(3).

ERRORS
     If |x| > 1 then:

     _IEEE_    The return value is NaN.
     _POSIX_   The return value is 0, and errno is set to EDOM.
     _XOPEN_   Same as _POSIX_, but errno is only set if matherr(3) returns 0.
	       The exception type is DOMAIN.
     _SVID_    Same as _XOPEN_, and a message is printed to stderr if errno is
	       set.

SEE ALSO
     acos(3),  atan(3),	 atan2(3),  cos(3),  cosh(3),  math(3),	 sin(3),
     sinh(3),  tan(3),	tanh(3)

STANDARDS
     The asin() function conforms to ANSI C X3.159-1989 (``ANSI C '').

BSDI BSD/OS		       February 17, 1998			     1

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