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.

Microsoft's Excel program, widely used in business, comes with many built-in functions that perform mathematical and logical operations on spreadsheet data. In Excel, functions are simple formulas you ...

Drag the square down the column to allow Excel to calculate the remaining tangent values without entering new formulas into the function window.

These functions include SIN, COS, TAN, ASIN, ACOS, and ATAN. You must enter the function name in a cell to use these functions, followed by the argument (the angle or number you want to evaluate).