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.
STANDARDS
The asin() function conforms to ISO/IEC 9899:1999 (“ISO C99”).