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ASIN(3) Library Functions Manual ASIN(3)

NAME

asin, asinf, asinlarc 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”).
January 29, 2013 NetBSD 7.0