# Python math.cos() Method

Musfirah Waseem Sep 16, 2022

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

## Syntax

``````math.cos(x)
``````

## Parameters

`x` Any positive or negative value.

## Returns

This method’s return type is a `float` value representing the cosine of `x` in radians.

## Examples

### Use Python `math.cos()` Method to Get Cosine of `x` in Radians

Code Snippet:

``````import math

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

x=0
value=math.cos(x)
print(f"The cosine of {x} is {value}.")

x=-2.349593486
value=math.cos(x)
print(f"The cosine of {x} is {value}.")
``````

Output:

``````The cosine of 0.5235987755982988 is 0.8660254037844387.
The cosine of 0 is 1.0.
The cosine of -2.349593486 is -0.7024237948400399.
``````

Note that the parameter can be an integer value (`int`) or a floating point number (`float`). In addition, the values may be either positive or negative.

### Use Python `math.cos()` Method to Get Cosine of `x` in Radians & Degrees

Code Snippet:

``````import math

x=34
value=math.cos(x)
print(f"The cosine of {x} is {value} radians.")
result = value * (180/math.pi)
print(f"The cosine of {x} is {result} degrees.")
``````

Output:

``````The cosine of 34 is -0.8485702747846052 radians.
The cosine of 34 is -48.61949536541442 degrees.
``````

Note that the output values of this method will always be in the range of `-1` and `1`.

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.