Returns the tangent of the given angle.
Syntax
TAN(number)
Number is 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 to copy an example
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Selecting an example from Help
 Press CTRL+C.
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A 
B 
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) 
