Command Reference : Function Reference : Function Reference: A
  
 
@atan
Arc tangent.
Compute the arc tangent (in radians) of x.
Syntax: @atan(x)
x: number
Return: number
Examples
= @atan(1)
returns 0.78539... (radians).
Cross-references
See also @acos, @asin, @cos, @sin, and @tan.