acosf() in C++

acosf(): This function is available in the library math.h. This function required one 

parameter.

It takes parameters in the range [-1,1].It returns the value in the range [0, π]. 

Parameterss: One parameter is required for this function.

__X: A floating point number whose acos value to be fined.

Syntax:

acosf(__X)

For Example:

acosf(0.56) = > It returns 0.976411

Approach

C++

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

int main()
{

    float x = 0.56;

    cout << acosf<< "\n";

    return 0;
}