50 lines
902 B
Markdown
50 lines
902 B
Markdown
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<!-- Note: This file is automatically generated from source code comments. Changes made in this file will be overridden. -->
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# Function acos
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Calculate the inverse cosine 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.acos(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 cosine of x
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### Throws
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Type | Description
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---- | -----------
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## Examples
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```js
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math.acos(0.5) // returns number 1.0471975511965979
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math.acos(math.cos(1.5)) // returns number 1.5
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math.acos(2) // returns Complex 0 + 1.3169578969248166 i
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```
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## See also
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[cos](cos.md),
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[atan](atan.md),
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[asin](asin.md)
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