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# Atan2

Computes the inverse tangent (arc tangent) of the ratio of its two arguments. For example, if x > 0, then the expression `ATAN2(y, x)` is equivalent to `ATAN(y/x)`

```mathematica
Atan2(1, 2) → 1.10
Atan2(100, 50) → 0.46
```

#### Inputs

`Atan2(x,y)`

* `x` - A number expression
* `y`  - A number expression