asin -- Calculate Arcsine

Format

#include <math.h>
double asin(double x);

Language Level: ANSI, POSIX, XPG4
asin calculates the arcsine of x, in the range -PI/2 to PI/2 radians.

Return Value
asin returns the arcsine of x. The value of x must be between -1 and 1. If x is less than -1 or greater than 1, asin sets errno to EDOM, and returns a value of 0.

Example
This example prompts for a value for x. It prints an error message if x is greater than 1 or less than -1; otherwise, it assigns the arcsine of x to y.

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define MAX 1.0
#define MIN -1.0
int main(void)
{
   double x, y;
   printf("Enter x\n");
   scanf("%lf", &x);
   /* Output error if not in range */
   if (x > MAX)
      printf("Error: %lf too large for asin\n", x);
   else
      if (x < MIN)
         printf( "Error: %lf too small for asin\n", x );
      else {
         y = asin( x );
         printf( "asin( %lf ) = %lf\n", x, y );
      }
   return 0;
   /****************************************************
      For the following input: 0.2
      The output should be:
      Enter x
      asin( 0.200000 ) = 0.201358
   ****************************************************/
}


acos -- Calculate Arccosine
atan - atan2 -- Calculate Arctangent
cos -- Calculate Arctangent
cosh -- Calculate Hyperbolic Cosine
_fasin -- Calculate Arcsine
_fcossin -- Calculate Cosine and S ine
_fsin -- Calculate Sine
_fsincos -- Calculate Sine and Cos ine
sin -- Calculate Sine
sinh -- Calculate Hyperbolic Sine
tan -- Calculate Tangent
tanh -- Calculate Hyperbolic Tangent
<math.h>