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ASIN(3)                    Library Functions Manual                    ASIN(3)

NAME
     asin, asinf, asinl -- arc sine function

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     asin(double x);

     float
     asinf(float x);

     long double
     asinl(long double x);

DESCRIPTION
     The asin(), asinf(), and asinl() 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), asinf(x), and asinl(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 ISO/IEC 9899:1999 (``ISO C99'').

NetBSD 7.1.2                   January 29, 2013                   NetBSD 7.1.2