The TAN function is a Math and Trigonometry function, and its purpose is to return a tangent of a number or angle. In this post, we show you how to use the TAN function in Microsoft Excel.

On Monday, the company announced that its Copilot AI is now available as an Excel function for Microsoft 365 insiders. That means you can add COPILOT to a formula and then use natural language in a ...

In Microsoft Excel, the SIGN number is a math and trigonometry function that returns the sign of a number. Learn how to use it.

Unfortunately, if you're using Excel 2019 or earlier, you won't be able to create your own functions using the methods described in this guide.