TAN function

This article describes the formula syntax and usage of the TAN  function in Microsoft Excel.

Description

Returns the tangent of the given angle.

Syntax

TAN(number)

The TAN function syntax has the following arguments:

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

Remark

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

Example

Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.

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