# 
## Overview

This **`math.atan2()` method** is used to calculate the arctangent of `y/x`, in radians, where `x` and `y` are coordinates of a point `(x,y)` in the [cartesian plane](https://en.wikipedia.org/wiki/Cartesian_coordinate_system).

---
> The value returned by this function is between `-π` and `π`.

# 
#  Syntax

---
```python
math.atan2(y, x)
```
---

# 
## Parameters

This method accepts positive and negative numeric values.

* **`y`**: the first parameter
* **`x`**: the second parameter

##
## Return value

This method returns a primitive `float` value, representing the arc tangent `x/y` in radians, between `-π` and `π`.

---
> This angle `θ` returned by this method is from polar coordinate `(r,θ)`.

import math

# Two positive coordinates
print(math.atan2(3, 4))

# Two negative coordinates
print(math.atan2(-3, -4))

# One positive and One negative coordinate
print(math.atan2(3.4, -3.1))

# 
## `TypeError`

This method will generate an error when we pass integer arguments. 

It's also Python version-dependent.

* _Python 3_: `TypeError`: a float is required.

* _Python 3.8_: `TypeError`: must be a real number, not a list.

import math

# It will generate type error on integer argument
y, x = 2, 3
theeta = math.atan2([y], [x])

print(theeta)

## 
### Example 2: Python 3.8 `TypeError`

What is math.atan2() in Python?

Calculates arctangent of y/x in radians, returns -π to π. Accepts only float numeric values.

What is math.atan2() in Python?

Overview

Syntax

Parameters

Return value

Code

`TypeError`

Example 1: Python 3 `TypeError`

Example 2: Python 3.8 `TypeError`

What is math.atan2() in Python?

Overview

Syntax

Parameters

Return value

Code

TypeError

Example 1: Python 3 TypeError

Example 2: Python 3.8 TypeError

`TypeError`

Example 1: Python 3 `TypeError`

Example 2: Python 3.8 `TypeError`