atanf() in C++

atanf():  This function is available in the file math.h. This function computes the principal value of the arc tangent of arg. This function takes one argument (arg). It returns the value in the range [ -π/2,π/2]. 

Parameters: One parameter is required for this function.

arg: The value whose arc tangent value is to be determined.

Syntax:

atanf(arg)

For Example:

atanf(1.5) = > It returns the value 0.982794

Approach

C++

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

int main()
{
    float x = 1.5;

    cout << atanf(x) << "\n";

    return 0;
}