Python math.atan2() Function

Mathematics

fractions module

module usage

random module

module usage

random.random()

random.randint()

random.choice()

Choosing random item(s)

random.choices()

random.sample()

random.shuffle()

math module

Introduction

cmath module

math.sin()

math.cos()

math.tan()

math.asin()

math.acos()

math.atan()

math.atan2()

math.sinh()

math.cosh()

math.tanh()

math.asinh()

math.acosh()

math.atanh()

math.exp()

math.pow()

math.sqrt()

math.log()

math.log2()

math.log10()

math.ceil()

math.floor()

math.trunc()

math.modf()

math.fmod()

math.fabs()

math.factorial()

math.gcd()

math.lcm()

math.isqrt()

math.isfinite()

math.isinf()

math.isnan()

math.ldexp()

math.frexp()

math.degrees()

math.radians()

math.copysign()

math.fsum()

math.gamma()

math.hypot()

math.isclose()

math.lgamma()

math.prod()

math.perm()

math.erf()

math.erfc()

math.dist()

math.comb()

math.remainder()

math.pi

math.e

math.inf

math.nan

math.tau

cmath.acosh()

cmath.acos()

cmath.asin()

cmath.asinh()

cmath.atan()

cmath.atanh()

cmath.cos()

cmath.cosh()

cmath.exp()

cmath.isclose()

cmath.isfinite()

cmath.isinf()

cmath.isnan()

cmath.log()

cmath.log10()

cmath.phase()

cmath.polar()

cmath.rect()

cmath.sin()

cmath.sinh()

cmath.sqrt()

cmath.tan()

cmath.tanh()

cmath.e

cmath.inf

cmath.infj

cmath.nan

cmath.nanj

cmath.pi

cmath.tau

The math.atan2() function returns the arc tangent (inverse tangent) of a ratio of two values, y and x.

math.atan2(y, x)

Where y is the numerator and x is the denominator of the ratio whose arc tangent we want. The function evaluates and returns the inverse tangent of y/x in radians.

import math

angle_in_rad = math.atan2(3, 4)
print(angle_in_rad)
angle_in_deg = math.degrees(angle_in_rad)
print(angle_in_deg)

The math.degrees function, as shown above, converts an angle from radians to degrees.

import math

print(math.atan2(2, 3))
print(math.atan2(1, 2))
print(math.atan2(5, 5))