# Excel TAN Function

Summary

The Excel TAN function returns the tangent of angle given in radians. To supply an angle to TAN in degrees, multiply the angle by PI()/180 or use the RADIANS function to convert to radians.

Purpose

Get the tangent of an angle

Return value

The tangent value.

Syntax

=TAN (number)

Arguments

**number**- The angle in radians for which you want the tangent.

Usage notes

Good links

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