TAN function

This article describes the formula syntax and usage of the TANfunction 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

The example may be easier to understand if you copy it to a blank worksheet.

How do I copy an example?

  1. Select the example in this article.

    Important   Do not select the row or column headers.

    selecting an example from help

    Selecting an example from Help

  2. Press CTRL+C.

  3. In Excel, create a blank workbook or worksheet.

  4. In the worksheet, select cell A1, and press CTRL+V.

    Important   For the example to work properly, you must paste it into cell A1 of the worksheet.

  5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

After you copy the example to a blank worksheet, you can adapt it to suit your needs.

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Formula

Description (Result)

=TAN(0.785)

Tangent of 0.785 radians (0.99920)

=TAN(45*PI()/180)

Tangent of 45 degrees (1)

=TAN(RADIANS(45))

Tangent of 45 degrees (1)

Applies To: Excel 2010, Excel Starter, Excel Online, SharePoint Online



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