tanh() function in C++ STL
The tanh() is an inbuilt function in C++ STL which returns the hyperbolic tangent of an angle given in radians.
Syntax :
tanh(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 tangent of the argument.
Below programs illustrate the above method:
Time Complexity: O(1)
Auxiliary Space: O(1)
Program 1:
CPP
// CPP program to demonstrate the // tanh() function #include <bits/stdc++.h> using namespace std; int main() { double x = 4.1, result; result = tanh (x); cout << "tanh(4.1) = " << result << endl; // x in Degrees double xDegrees = 90; x = xDegrees * 3.14159 / 180; result = tanh (x); cout << "tanh(90 degrees) = " << result << endl; return 0; } |
Output
tanh(4.1) = 0.999451 tanh(90 degrees) = 0.917152
Program 2:
CPP
// CPP program to demonstrate the // tanh() function #include <bits/stdc++.h> using namespace std; int main() { int x = -4; double result; result = tanh (x); cout << "tanh(-4) = " << result << endl; // x in Degrees double xDegrees = 90; x = xDegrees * 3.14159 / 180; result = tanh (x); cout << "tanh(90 degrees) = " << result << endl; return 0; } |
Output
tanh(-4) = -0.999329 tanh(90 degrees) = 0.761594
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 tanh() // function when a string is passed as argument #include <bits/stdc++.h> using namespace std; int main() { string x = "gfg" ; double result; result = tanh (x); cout << "tanh(x) = " << result << endl; return 0; } |
Output:
prog.cpp:14:20: error: no matching function for call to 'tanh(std::__cxx11::string&)'
result = tanh(x);
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