ASIN(3) BSD Library Functions Manual ASIN(3)NAMEasin — arc sine function
SYNOPSIS
#include <math.h>
double
asin(double x);
DESCRIPTION
The asin() function computes the principal value of the arc sine of x in
the range [-π/2, +π/2].
SPECIAL VALUES
asin(�0) returns �0.
asin(x) returns a NAN and raises the "invalid" floating-point exception
for |x| > 1.
SEE ALSOacos(3), atan(3), atan2(3), cos(3), cosh(3), sin(3), sinh(3), tan(3),
tanh(3), math(3), matherr(3)STANDARDS
The asin() function conforms to ISO/IEC 9899:1999(E).
BSD November 15, 2002 BSD