Python math.atan2() Method

Example

Return the arc tangent of y/x in radians:

# Import math Library
import math

# Return the arc tangent of y/x in radians
print(math.atan2(8, 5))
print(math.atan2(20, 10))
print(math.atan2(34, -7))

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Definition and Usage

The math.atan2() method returns the arc tangent of y/x, in radians. Where x and y are the coordinates of a point (x,y).

The returned value is between PI and -PI.

Syntax

math.atan2(y, x)

Parameter Values

Parameter	Description
y	Required. Specifies a positive or negative number
x	Required. Specifies a positive or negative number

Technical Details

Return Value:	A `float` value, representing arc tangent of y/x in radians, which is between PI and -PI
Python Version:	1.4

❮ Math Methods