The function is defined in <cmath> header file.
[Mathematics] cosh x = cosh(x) [In C++ Programming]
cosh() prototype [As of C++ 11 standard]
double cosh(double x); float cosh(float x); long double cosh(long double x); double cosh(T x); // For integral type.
The cosh() function takes a single argument in radians and returns the hyperbolic cosine of that angle in double, float or long double type.
The hyperbolic cosine of x is given by,
cosh() Parameters
The cosh() function takes a single mandatory argument representing a hyperbolic angle in radians.
cosh() Return value
The cosh() function returns the hyperbolic cosine of the argument.
If the magnitude of the result is too large to be represented by a value of the return type, the function returns HUGE_VAL with the proper sign, and an overflow range error occurs.
Example 1: How cosh() function works?
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
double x = 4.55, result;
result = cosh(x);
cout << "cosh(x) = " << result << endl;
// x in Degrees
double xDegrees = 90;
x = xDegrees * 3.14159/180;
result = cosh(x);
cout << "cosh(x) = " << result << endl;
return 0;
}
When you run the program, the output will be:
cosh(x) = 47.3215 cosh(x) = 2.50918
Example 2: cosh() function with integral type
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
int x = -3;
double result;
result = cosh(x);
cout << "cosh(x) = " << result << endl;
return 0;
}
When you run the program, the output will be:
cosh(x) = 10.0179
