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”).