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52 lines
1.1 KiB
Markdown
52 lines
1.1 KiB
Markdown
# Function atan2
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Calculate the inverse tangent function with two arguments, y/x.
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By providing two arguments, the right quadrant of the computed angle can be
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determined.
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For matrices, the function is evaluated element wise.
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## Syntax
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```js
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math.atan2(y, x)
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```
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### Parameters
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Parameter | Type | Description
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--------- | ---- | -----------
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`y` | Number | Boolean | Complex | Array | Matrix | null | Second dimension
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`x` | Number | Boolean | Complex | Array | Matrix | null | First dimension
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### Returns
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Type | Description
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---- | -----------
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Number | Complex | Array | Matrix | Four-quadrant inverse tangent
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## Examples
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```js
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math.atan2(2, 2) / math.pi; // returns number 0.25
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var angle = math.unit(60, 'deg'); // returns Unit 60 deg
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var x = math.cos(angle);
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var y = math.sin(angle);
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math.atan(2); // returns Complex 1.5707963267948966 -1.3169578969248166 i
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```
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## See also
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[tan](tan.md),
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[atan](atan.md),
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[sin](sin.md),
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[cos](cos.md)
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