Python math.cos() Method

1. Syntax
2. Parameters
3. Returns
4. Examples

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

Syntax

math.cos(x)

Parameters

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.