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
To work in degrees rather than radians: TAN(PI()/180) or TAN(RADIANS(number))
