The VBA COS function is listed under the math category of VBA functions. When you use it in a VBA code, **it returns the cosine of a supplied angle**. In simple words, a cosine of an angle is the length of the adjacent side of a right triangle, divided by the length of the hypotenuse which this function returns.

## Syntax

**Cos(Number)**

## Arguments

**Number**: The angle value for which you want to calculate the cosine.

## Example

To practically understand how to use VBA COS function, you need to go through the below example where we have written a vba code by using it:

```
Sub example_COS()
Range("B1").Value = Cos(Range("A1"))
End Sub
```

In the above example, we have used the value from cell A1 (12) and then we have used the COS function to get the cosine of a supplied angle and it has returned 0.843853958732492 in the result.

## Notes

- If the value specified is a value other than a number or a string which can’t be recognized as a number, VBA will return the run-time 13 error.
- You can multiply the result returned by the COS with pi/180 to convert it into radians and 180/pi to convert it into degrees.

## Related Functions

ABS | ATN | EXP | FIX | INT | LOG | RND | ROUND | SGN | SIN | SQR | TAN