> For the complete documentation index, see [llms.txt](https://docs.emobiq.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emobiq.com/emobiq-client/006-actions-and-visual-logic/action-reference/react-native/math/cos.md).

# cos

## Description

Get the cosine of an angle, in radians. The output will return a number between -1 and 1.

## Input / Parameter

| Name  | Description                         | Input Type | Default | Options | Required |
| ----- | ----------------------------------- | ---------- | ------- | ------- | -------- |
| value | The number to return the cosine of. | Number     | -       | -       | Yes      |

## Output

| Description                     | Output Type |
| ------------------------------- | ----------- |
| Returns the cosine of an angle. | Number      |

## Example

In this example, we will get the cosine of a value and print it in the console.

### Steps

1. Drag a `button` component into the canvas and open the `Action` tab. Select the `press` event of the button and drag the `Log.write` function to the event flow.
2. Call the function `Math.cos` inside the `Log.write` function.
3. Enter the value to get the cosine of.

   ![](/files/sJeGHdlMd0DRLRK6CgW1)

### Result

1. The console will print the cosine of the value passed.

   ![](/files/UX01lVzo6FvQ6K6dcWMe)