# Python math.atan() Method

Musfirah Waseem Jan 30, 2023

Python `math.atan()` method is an efficient way of calculating the arctangent of a number, x, in radians.

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

``````math.atan(x)
``````

### Parameters

`x` Any positive or negative value in the range `-PI/2 and PI/2` radians.

### Return

The return type of the `math.atan()` method is a float value representing the arctangent of `x` in radians.

## Example Codes: Use the `math.atan()` Method in Python

``````import math

x = math.pi / 6
value = math.atan(x)
print(f"The arctangent of {x} is {value}.")

x = math.pi
value = math.atan(x)
print(f"The arctangent of {x} is {value}.")

x = math.pi / (-2)
value = math.atan(x)
print(f"The arctangent of {x} is {value}.")
``````

Output:

``````The arctangent of 0.5235987755982988 is 0.48234790710102493.
The arctangent of 3.141592653589793 is 1.2626272556789118.
The arctangent of -1.5707963267948966 is -1.0038848218538872.
``````

Note that the parameters should be in radians. The values may be either positive or negative.

## Example Codes: Enter Different Parameters in the `math.atan()` Method

``````import math

x = "c"
value = math.atan(x)
print(f"The arctangent of {x} is {value}.")
``````

Output:

``````Traceback (most recent call last):
File "main.py", line 5, in <module>
value=math.atan(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.