Abaqus

[Shins K]

While creating analytical fields using expressions in Abaqus, what will the unit of theta if we use trigonomtetric function?
I have applied pressure as trigonometric function using the expression cos(2*atan(Y/X)). I would like to know what will the unit of atan(Y/X). Is it in Degree or Radian?

 

[FEA way]

Angle units are the only built-in units in Abaqus. All trigonometric functions use radians in this software.