C library functions - asin ()

C standard library - <math.h>

description

C library functionsdouble asin (double x) Returns in radians the arc sine of x.

statement

Here is () statement asin function.

double asin(double x)

parameter

• x - between [-1, +1] range of floating-point values.

return value

This function returns expressed in radians x arcsine, in radians interval [-pi / 2, + pi / 2].

Examples

The following example demonstrates asin () function is used.

#include <stdio.h>
#include <math.h>

#define PI 3.14159265

int main ()
{
   double x, ret, val;
   x = 0.9;
   val = 180.0 / PI;

   ret = asin(x) * val;
   printf("%lf 的反正弦是 %lf 度", x, ret);
   
   return(0);
}

Let's compile and run the above program, which will result in the following:

0.900000 的反正弦是 64.190609 度

C standard library - <math.h>