C Language: asin function
(Arc Sine)

In the C Programming Language, the asin function returns the arc sine of x.

Syntax

The syntax for the asin function in the C Language is:

double asin(double x);

Parameters or Arguments

x
A value between -1 and 1. A domain error will occur if x is not between -1 and 1.

Returns

The asin function returns the arc sine of a number represented by x. It will return a value between -π/2 and π/2.

Required Header

In the C Language, the required header for the asin function is:

#include <math.h>

Applies To

In the C Language, the asin function can be used in the following versions:

  • ANSI/ISO 9899-1990

asin Example

/* Example using asin by TechOnTheNet.com */

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

int main(int argc, const char * argv[])
{
    /* Define temporary variables */
    double value;
    double result;
    
    /* Assign the value we will find the asin of */
    value = 0.5;
    
    /* Calculate the Arc Sine of value */
    result = asin(value);
    
    /* Display the result of the calculation */
    printf("The Arc Sine of %f is %f\n", value, result);
    
    return 0;
}

When compiled with gcc and run, this application will output:

The Arc Sine of 0.500000 is 0.523599

Similar Functions

Other C functions that are similar to the asin function:

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