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ASIN(3)                  BSD Library Functions Manual                  ASIN(3)

NAME
     asin, asinf -- arc sine function

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <&lt;math.h>&gt;

     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) return NaN and set 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)

STANDARDS
     The asin() function conforms to ANSI X3.159-1989 (``ANSI C89'').

BSD                               May 2, 1991                              BSD