TAN

Using the Excel TAN Function

Summary

The TAN function returns the tangent of a given angle.

Syntax

=TAN (number)

Syntax Breakdown

Number
Required. The angle, provided in radians, for which you want to find the tangent. If the angle is in degrees, use the RADIANS function to convert to radians.


Usage Notes

The TAN function returns the tangent of an angle given in radians. Angles in degrees can be converted to radians using the RADIANS function or by multiplying the degree by PI()/180. For example, to find the TAN of 45 degrees, either of the following formulas could be used:

Excel TAN with Degrees