# Python math.tanh() Method

Musfirah Waseem Jan 30, 2023 Oct 05, 2022

Python `math.tanh()` method is an efficient way of calculating the hyperbolic tangent of a number in radians. The input parameter must be in radians.

## Syntax of Python `math.tanh()` Method

``````math.tanh(x)
``````

### Parameters

`x` - Any positive or negative radian value to be operated on.

### Return

This method returns a float value representing the hyperbolic tangent of `x` in radians.

## Example 1: Use the `math.tanh()` Method in Python

``````import math

x=90

value=math.tanh(x)

print(f"The hyperbolic tangent of {x} is {value}.")

x=0

value=math.tanh(x)

print(f"The hyperbolic tangent of {x} is {value}.")

x=-34.5

value=math.tanh(x)

print(f"The hyperbolic tangent of {x} is {value}.")

x=math.pi

value=math.tanh(x)

print(f"The hyperbolic tangent of {x} is {value}.")

x=math.inf

value=math.tanh(x)

print(f"The hyperbolic tangent of {x} is {value}.")
``````

Output:

``````The hyperbolic tangent of 90 is 1.0.
The hyperbolic tangent of 0 is 0.0.
The hyperbolic tangent of -34.5 is -1.0.
The hyperbolic tangent of 3.141592653589793 is 0.99627207622075.
The hyperbolic tangent of inf is 1.0.
``````

Note that the arguments can be in integers or floats. The values may either be positive or negative.

## Example 2: Use the `math.tanh()` Method to Get the Hyperbolic Tangent of Degrees

``````import math

print("The hyperbolic tangent of 30 degrees is ", math.tanh(math.radians(30)))
``````

Output:

``````The hyperbolic tangent of 30 degrees is  0.4804727781564516
``````

We use these methods in mathematical computations related to geometry and have a certain application in astronomical computations.

## Example 3: `TypeError` When Using `math.tanh()` Method

``````import math

x='h'

value=math.tanh(x)

print(f"The hyperbolic tangent of {x} is {value}.")
``````

Output:

``````Traceback (most recent call last):
File "main.py", line 5, in <module>
value=math.tan(x)
TypeError: must be real number, not str
``````

Note that a `TypeError` exception may occur if the argument value is not a number.

Musfirah is a student of computer science from the best university in Pakistan. She has a knack for programming and everything related. She is a tech geek who loves to help people as much as possible.