Which dynamo package has this node?
Hello hard to say, where do you have this from ?
Can you show what the node looks like in terms of inputs/outputs/etc.? This is one I haven’t heard of before.
Revit API has XYZ.AngleTo() which is the angle between two vectors
Equivalent node is Vector.AngleWithVector
No idea where that comes from.
Try this one: Dynamo Dictionary