TAN Function in Excel: Syntax, Examples and Free Practice

By Rinkesh Shah, founder of Cellgrids.

TAN is an Excel Math & Trig function. Returns the tangent of an angle given in radians.

TAN syntax

=TAN(number)

TAN is used in financial models and engineering-style calculations where precise numeric work is needed.

Open the live Excel-style spreadsheet and try TAN yourself. No Excel install or sign-up needed to start.

What does the TAN function do in Excel?

Returns the tangent of an angle given in radians.

What is the syntax of TAN in Excel?

The syntax is =TAN(number). number: A number to use in the calculation.

Where can I practice TAN online for free?

Open the free live spreadsheet on Cellgrids and try TAN yourself. No Excel install is needed and you can start without signing up.