NAME    [Toc]    [Back]

     asin, asinf - arc sine functions

SYNOPSIS    [Toc]    [Back]

     #include <math.h>

     double
     asin(double x);

     float
     asinf(float x);

DESCRIPTION    [Toc]    [Back]

     The asin() function computes the principal value of the  arc
sine of x in
     the  range [-pi/2, +pi/2].  The asinf() function is a single
precision
     version of asin().

RETURN VALUES    [Toc]    [Back]

     If |x|>1, asin(x) and asinf(x) return NaN and set the global
variable
     errno to EDOM.

SEE ALSO    [Toc]    [Back]

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

OpenBSD      3.6                            May      2,      1991