Arc sine
[Classification]
Mathematical library
[Syntax]
#include <math.h>
double __far asin(double x);
[Return value]
Returns the arc sine (arcsine) of x. The returned value is in radian and in a range of [- / 2, / 2].
If x is not between [-1, 1], asin returns a Not-a-Number (NaN) and sets macro EDOM to global variable errno.
[Description]
This function calculates the arc sine (arcsine) of x. Specify x as, -1 <= x <= 1.