# How to Use Excel COS Function?

Microsoft Excel is a powerful data visualization and analysis program used all around the world. It uses spreadsheets to store, organize, or perform operations with formulas and functions. Sometimes, we need to use the COS function in our data, doing this manually will take too much time. We suggest you use the COS function to calculate it.

In this article, you will understand the usage of Excel COS Function with its syntax, explanation, and examples. Get an official version of MS Excel from the following link:

https://www.microsoft.com/en-in/microsoft-365/excel

## Explanation of COS Function

• It is one of the built-in functions in Microsoft Excel.
• This function returns the Cosine value of the given (angle) radians.
• For example, RADIANS(0.525) returns the cosine value as 0.866

## Syntax

• Here, you will see the syntax of the COS function.
• To apply this function on your spreadsheet, you have to select a cell and enter the formula in the following format.
• Once you enter the formula, just click on the button to get the result.

=COS(number)

Argument Explanation

Number – The angle in radians to which you need to find the cosine value.

Note:
If the argument is a non-numeric value (letters and special characters) and then it returns #VALUE! Error.

## Practical Examples

Here, we come up with some examples to know how to use the COS function in the Excel spreadsheet.

• Initially, you have to open your Excel workbook on your PC and launch a worksheet that has data.
• For example, we have given the degree values in Column B, and their corresponding radians in Column C.
• Here, we will get the Sin value of the given radians in Column E using the COS function.
• Then, you have to enter the formula in the cell as shown below to get the result.
• After entering the formula, you need to click the button to get the output, as shown below. You can drag down the cell to fill the remaining cells.

## Input that Causes Error

• If the argument is a non-numeric value (letters and special characters) and then it returns #VALUE! Error.