acosh() function

acosh(): This function is available in the library math.h.

The acosh() function takes a single argument and returns the arc hyperbolic 

cosine of that value in radian.

The acosh() function takes a single mandatory argument that is greater or 

equal to 1.

Note: If the argument is less than 1, a domain error occurs.

Example 1: In radians

Input:  x = 10.45
Output: 3.03745

Example 2: In degrees

Input:  x = 10.45
Output: 174.121

Approach 1: In radians

C++

#include <bits/stdc++.h>
using namespace std;

int main()
{
    double x = 10.45;

    cout << acosh(x);

    return 0;
}

Approach 2: In degrees

C++

#include <bits/stdc++.h>
using namespace std;

int main()
{
    double x = 10.45;

    double radian = acosh(x);
    double degrees = radian * 180 / 3.14;

    cout << degrees << "\n";

    return 0;
}