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45 lines
872 B
Markdown
45 lines
872 B
Markdown
# Function atan
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Calculate the inverse tangent of a value.
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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.atan(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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`x` | number | BigNumber | Complex | Array | Matrix | Function input
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### Returns
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Type | Description
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---- | -----------
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number | BigNumber | Complex | Array | Matrix | The arc tangent of x
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## Examples
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```js
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math.atan(0.5); // returns number 0.4636476090008061
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math.atan(math.tan(1.5)); // returns number 1.5
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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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[asin](asin.md),
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[acos](acos.md)
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