ASIN(3) BSD Library Functions Manual ASIN(3)NAME
asin, asinf — arc sine function
LIBRARY
Math Library (libm, -lm)
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 [-π/2, +π/2].
RETURN VALUES
If |x|>1, asin(x) and asinf(x) return NaN and set the global variable
errno to EDOM.
SEE ALSOacos(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