acos() function of math.h in C

acos() function of math.h in C: Learn how to find the acos (Arc Cosine) of a number in C with an Example?
Submitted by Manu Jemini, on April 01, 2018

This function provides the functionality to calculate the arc cosine of a number. The Number should be less than equal to 1 and greater than equal to 0.

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

Example:

    X = 0.2
    The function will return 1.369438 

The Function is a part of the math.h library which should be included in the program before using this function.

math.h - acos() function Example in C

#include <stdio.h> #include <math.h> int main() { // Defining variables double a,b; // Assigning value for getting acos value a = 0.2; // Calculating the arc cosine of a b = acos(a); // Displaying the result for the user printf("The calculated value is: %lf \n\n", b); return 0; }

Output

math.h - acos()  in c language



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