Last Updated : 11 Jul, 2025
Javascript Math.tanh() method is used to calculate the value of the hyperbolic tangent of a number.
Syntax:
Math.tanh(x)
Parameter: This method accepts a single parameter as mentioned above and described below:
Return value: It returns the calculated value of the hyperbolic tangent of the number.< Below example illustrate the Math.tanh() method in JavaScript:
Example: Here formula for calculating the 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: 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
Example: Below is an example of the Math.tanh() Method.
javascript
// Printing hyperbolic tangent of some numbers
// taken as parameter of Math.tanh() function.
console.log(Math.tanh(0));
console.log(Math.tanh(1));
console.log(Math.tanh(5));
console.log(Math.tanh(22));
console.log(Math.tanh(-2));
console.log(Math.tanh(4));
0 0.7615941559557649 0.9999092042625951 1 -0.9640275800758169 0.999329299739067
Example: It is an error case because the complex number can not be taken as the parameter of the function only integer value can be taken as the parameter.
javascript
// complex number can not be calculated
// as the hyperbolic tangent.
console.log(Math.tanh(1 + 2i));
Output:
Error: Invalid or unexpected token
Example: Other than integer nothing is accepted as the parameter of the function which is why here string as the parameter gives NaN i.e, not a number.
javascript
// 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.
console.log(Math.tanh("geeksforgeeks"));
console.log(Math.tanh("gfg"));
Example: 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.
javascript
// Printing hyperbolic tangent of some
// numbers from 0 to 9
// taken as parameter of Math.tanh() function.
for (i = 0; i < 10; i++) {
console.log(Math.tanh(i));
}
0 0.7615941559557649 0.9640275800758169 0.9950547536867305 0.999329299739067 0.9999092042625951 0.9999877116507956 0.9999983369439447 0.9999997749296758 0.999999969540041
Supported Browsers:
We have a complete list of Javascript Math Objects methods, to check those please go through this Javascript Math Object Complete reference article.
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