NAME    [Toc]    [Back]

     asin, asinf - arc sine function

LIBRARY    [Toc]    [Back]

     Math Library (libm, -lm)

SYNOPSIS    [Toc]    [Back]

     #include <math.h>

     double
     asin(double x);

     float
     asinf(float x);

DESCRIPTION    [Toc]    [Back]

     The asin() and asinf() functions compute the principal value of the arc
     sine of x in the range [-pi/2, +pi/2].

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)

STANDARDS    [Toc]    [Back]

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

BSD                               May 2, 1991                              BSD