C++ tanh()

The Math.tanh() function returns the hyperbolic tangent of an angle given in radians.

Syntax

std::tanh(angle)

The angle is measured in radians and the return type is a double, float, or long double.

The mathematical formula used in tanh() looks like this:

tanh(x) = (e^x - e^-x) / (e^x + e^-x)

Example

The following example demonstrates the application of .tanh() function:

#include <iostream>
#include <cmath>

int main() {
  // Values in degree
  double value1 = -30.0;
  double value2 = 120.0;
  double value3 = 180.0;

  // Convert degree to radian
  value1 = value1 * 3.1415 / 180;
  value2 = value2 * 3.1415 / 180;
  value3 = value3 * 3.1415 / 180;

  double result1 = std::tanh(value1);
  double result2 = std::tanh(value2);
  double result3 = std::tanh(value3);

  std::cout << "The value of tanh(" << value1 << ") is: " << result1 << "\n";
  std::cout << "The value of tanh(" << value2 << ") is: " << result2 << "\n";
  std::cout << "The value of tanh(" << value3 << ") is: " << result3 << "\n";
}

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This produces the following output:

The value of tanh(-0.523583) is: -0.480461
The value of tanh(2.09433) is: 0.97012
The value of tanh(3.1415) is: 0.996271

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Codebyte Example

This example uses tanh() to return the hyperbolic tangent of 1.0 radians:

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