C asin() function
C asin() function - Calculate arcsine
The asin() function is used to calculate the arcsine of x, in the range -π/2 to π/2 radians.
Syntax:
double asin(double x)
Parameters:
| Name | Description | Required /Optional |
|---|---|---|
| x | Value whose arcsine is to be calculated. | Required |
Return value from asin()
- Returns the arcsine (the inverse sine function) of x in the range -π/2 to π/2 radians.
Example: asin() function
The following example shows the usage of asin() function:
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define MAX 1.0
#define MIN -1.0
int main(void)
{
double x, y;
printf("Input the value of x: ");
scanf( "%lf", &x );
y = asin(x);
if (x > MAX)
printf( "Error: %lf not in the range!\n", x );
else if (x < MIN)
printf( "Error: %lf not in the range!\n", x );
else
printf("asin(%lf) = %lf\n", x, y);
}
Output:
Input the value of x: 0 asin(0.000000) = 0.000000 Input the value of x: 1.5 Error: 1.500000 not in the range! Input the value of x: -1.5 Error: -1.500000 not in the range!
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