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TAN function: Description, Usage, Syntax, Examples and Explanation

What is TAN function in Excel?

TAN function is one of the Math and Trig functions in Microsoft Excel that returns the tangent of the given angle.

Syntax of TAN function

TAN(number)

The TAN function syntax has the following arguments:

  • Number: The angle in radians for which you want the tangent.

TAN formula explanation

If your argument is in degrees, multiply it by PI()/180 or use the RADIANS function to convert it to radians.

Example of TAN function

Steps to follow:

1. Open a new Excel worksheet.

2. Copy data in the following table below and paste it in cell A1

Note: For formulas to show results, select them, press F2 key on your keyboard and then press Enter.

You can adjust the column widths to see all the data, if need be.

Formula Description (Result) Result
=TAN(0.785) Tangent of 0.785 radians (0.99920) 0.99920
=TAN(45*PI()/180) Tangent of 45 degrees (1) 1
=TAN(RADIANS(45)) Tangent of 45 degrees (1) 1

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