JavaScript | Math.tanh() function

The Math.tanh() is an inbuilt function in JavaScript which is used to calculate the value of hyperbolic tangent of a number.
Syntax:

Math.tanh(p)

Parameter: This function accepts a single parameter p which is a number for which the value of hyperbolic tangent is going to be calculated.

Return value: It returns the calculated value of the hyperbolic tangent of the number.

Examples:

Input :Math.tanh(0)
Output:0

Explanation:
Here formula for calculating hyperbolic tangent of any number is : The number e is a mathematical constant having an approximate value equal to 2.718.
 tanh(p) = sinh(p)/cosh(p) = e^p-e^-p/e^p+e^-p = e^0-e^-0/e^0+e^-0 = 0
In the same way hyperbolic tangent of any number can be calculated just after replacing p with the desired number.

Input :Math.tanh(18)
Output:0.9999999999999996

Explanation:
Here same as above calculation, when we put 18 instead of p then the value becomes as output shown above.
Let’s see some JavaScript code:

  • Example 1:
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    <script>
      // Printing hyperbolic tangent of some numbers
      // taken as parameter of Math.tanh() function.
      document.write(Math.tanh(0));
      document.write(Math.tanh(1));
      document.write(Math.tanh(5));
      document.write(Math.tanh(22));
      document.write(Math.tanh(-2));
      document.write(Math.tanh(4));
    </script>

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    Output:

    0
    0.7615941559557649
    0.9999092042625951
    1
    -0.9640275800758169
    0.999329299739067
  • Example 2: It is an error case because complex number can not be taken as the parameter of the function only integer value can be taken as the parameter.
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    <script>
      // complex number can not be calculated as the hyperbolic tangent.
      documnet.write(Math.tanh(1 + 2i));
    </script>

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    Output:

    Error: Invalid or unexpected token
  • Example 3: Other than integer nothing is accepted as the parameter of the function that is why here string as the parameter gives NaN i.e, not a number.
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    <script>
      // Any string value as the parameter of the function
      // gives NaN i.e, not a number
      // because only number can be used as the parameters.
      document.write(Math.tanh("geeksforgeeks"));
      document.write(Math.tanh("gfg"));
    </scrippt>

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    Output:

    NaN
    NaN

Application: Its practical application is that whenever we need to find the value of the hyperbolic tangent of a number that time we take the help of Math.tanh() function in JavaScript.

  • Example:
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    <script>
      // Printing hyperbolic tangent of some 
      //numbers from 0 to 9
      // taken as parameter of Math.tanh() function.
      for (i = 0; i < 10; i++)
      {
         document.write(Math.tanh(i) + "<br>");
      }

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    Output:

    0
    0.7615941559557649
    0.9640275800758169
    0.9950547536867305
    0.999329299739067
    0.9999092042625951
    0.9999877116507956
    0.9999983369439447
    0.9999997749296758
    0.999999969540041

Supported Browsers: The browsers supported by JavaScript Math.tanh() function are listed below:

  • Google Chrome
  • Internet Explorer
  • Firefox
  • Opera
  • Safari


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Improved By : Akanksha_Rai