In geometric algebra I have a plane defined by a bivector. Given two unit vectors in this plane, how do I find the angle I need to rotate the first vector so that it becomes equal with the second.
The usual method for computing the angle between two vectors gives an answer between zero and pi. That's no good. I need an answer between zero and 2pi. I'd rather not have several cases depending on quadrants. It seems like there has to be a direct way to do it.