The TAN function returns a value that approximates the tangent of an angle or arc, expressed in radians, that is specified by argument-1. The type of this function is numeric. 
 
  General Format
 
	  
	  
 
  Arguments
 
	   
	 - Argument-1 must be class numeric. 
		Note: Conversion factors from degrees and Gon (grad) to radians are specified in the section 
		   Trigonometric Functions. 
		 
 
Returned Values
 
	   
	 - The returned value is the approximation of the tangent of argument-1. 
	 
- Floating-point format is used for numeric non-integer results.