GNU/Linux |
CentOS 4.8 |
i386 |
asin(3) |
asin, asinf, asinl − arc sine function
#include <math.h>
double asin(double x);
float asinf(float x);
long double asinl(long double x);
The asin() function calculates the arc sine of x; that is the value whose sine is x. If x falls outside the range −1 to 1, asin() fails and errno is set.
The asin() function returns the arc sine in radians and the value is mathematically defined to be between -PI/2 and PI/2 (inclusive).
EDOM |
x is out of range. |
SVID 3, POSIX, BSD 4.3, ISO 9899. The float and long double variants are C99 requirements.
acos(3), atan(3), atan2(3), cos(3), sin(3), tan(3)
asin(3) |