ASIN(3)                   OpenBSD 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 asinf() functions compute the principal value of the arc
     sine of x in the range [-pi/2, +pi/2].

RETURN VALUES
     If |x|>1, asin(x) and asinf(x) returns NaN and sets the global variable
     errno to EDOM.

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

OpenBSD 2.6                       May 2, 1991                                1