cosh() function in C++ STL (original) (raw)

Last Updated : 2 Feb, 2023

The cosh() is an inbuilt function in C++ STL which returns the hyperbolic cosine of an angle given in radians. Syntax :

cosh(data_type x)

**Parameter :**The function accepts one mandatory parameter x which specifies the hyperbolic angle in radian. The parameter can be of double, float or long double datatype.
Return Value: The 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 inf. Below programs illustrate the above method:

Time Complexity: O(1)
Auxiliary Space: O(1)

Program 1:

CPP `

// CPP program to demonstrate the // cosh() function #include <bits/stdc++.h> using namespace std;

int main() { double x = 4.1, result;

result = cosh(x);
cout << "cosh(4.1) = " << result << endl;

// x in Degrees
double xDegrees = 90;
x = xDegrees * 3.14159 / 180;

result = cosh(x);
cout << "cosh(90 degrees) = " << result << endl;

return 0;

}

`

Output

cosh(4.1) = 30.1784 cosh(90 degrees) = 2.50918

Program 2:

CPP `

// CPP program to demonstrate the // cosh() function #include <bits/stdc++.h> using namespace std;

int main() { int x = -4; double result;

result = cosh(x);
cout << "cosh(-4) = " << result << endl;

// x in Degrees
double xDegrees = 90;
x = xDegrees * 3.14159 / 180;

result = cosh(x);
cout << "cosh(90 degrees) = " << result << endl;

return 0;

}

`

Output

cosh(-4) = 27.3082 cosh(90 degrees) = 1.54308

Errors and Exceptions: The function returns no matching function for call to error when a string or character is passed as an argument.

Program 3:

CPP `

// CPP program to demonstrate the // cosh() function when string passed #include <bits/stdc++.h> using namespace std;

int main() { string x = "gfg"; double result;

result = cosh(x);
cout << "cosh("gfg") = " << result << endl;

return 0;

}

`

Output:

prog.cpp:14:20: error: no matching function for call to 'cosh(std::__cxx11::string&)' result = cosh(x);

Program 4: When argument is too large.

CPP `

// CPP program to demonstrate the cosh() // function #include <bits/stdc++.h> using namespace std;

int main() { double x = 3000.0, result;

result = cosh(x);
cout << "cosh(3000.0) = " << result << endl;

return 0;

}

`