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asin() function of math.h in C

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In this article, we are going to learn about asin() function of math.h header file in C language and then try to use it with the help of an example.
Submitted by Manu Jemini, on April 01, 2018

This function provides the functionality to calculate the arc sin of a value. The value should be less than equal to 1 and greater than equal to -1.

This function takes a single parameter as the value whose arc sin value needs to be calculated and return the value which is the result of the calculation.

Example:

```    X = 0.2
The function will return 0.201358
```

This function is a part of math.h library and it must be included in the program.

math.h - asin() function Example in C

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

int main()
{
// Define the type of variables
double a,b;

// Assigning value for getting asin value
a = 0.2;

// Calculating the arc sine of a
b = asin(a);

// Displaying the result for the user
printf("The calculated value is: %lf \n\n", b);

return 0;
}
```

Output

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