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JavaScript Math tanh() Method

  • Last Updated : 17 Feb, 2022

Below is the example of the Math tanh() Method.

  • Example:




    <script>
      // Printing hyperbolic tangent of some numbers
      // taken as parameter of Math.tanh() function.
      document.write(Math.tanh(0)+"<br>");
      document.write(Math.tanh(1)+"<br>");
      document.write(Math.tanh(5)+"<br>");
      document.write(Math.tanh(22)+"<br>");
      document.write(Math.tanh(-2)+"<br>");
      document.write(Math.tanh(4)+"<br>");
    </script>
  • Output:
    0
    0.7615941559557649
    0.9999092042625951
    1
    -0.9640275800758169
    0.999329299739067

The Math.tanh() method is used to calculate the value of hyperbolic tangent of a number.

Syntax:

Math.tanh(x)

Parameter: This method accepts a single parameter as mentioned above and described below:

  • x: 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.< Below example illustrate the Math tanh() method in JavaScript:

  • Example 1: Here formula for calculating hyperbolic tangent of any 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

    Input :Math.tanh(0)
    Output : 0
  • Example 2: In the same way hyperbolic tangent of any number can be calculated just after replacing p with the desired number. Here the same as the above calculation, when we put 18 instead of x then the value becomes as output shown above.
    Input : Math.tanh(18)
    Output : 0.9999999999999996

More codes for the above method are as follows:
Program 1: 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.




<script>
  // complex number can not be calculated
  // as the hyperbolic tangent.
  document.write(Math.tanh(1 + 2i));
</script>

Output:

Error: Invalid or unexpected token

Program 2: 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.




<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")+"<br>");
  document.write(Math.tanh("gfg"));
</script>

Output:

NaN
NaN

Program 3: 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.




<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>");
  }
</script>

Output:

0
0.7615941559557649
0.9640275800758169
0.9950547536867305
0.999329299739067
0.9999092042625951
0.9999877116507956
0.9999983369439447
0.9999997749296758
0.999999969540041

Supported Browsers:

  • Google Chrome 38 and above
  • Firefox 25 and above
  • Opera 25 and above
  • Safari 8 and above
  • Edge 12 and above

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