Recent content by bigworld005

Hi, I forget to mention: the scale in the two system is same, so no shrink or extend in the axis. by the way, I think Cartesian system means the three axises X,Y,Z, they are normal to each other. hope I am right. thanks, t

hi, thanks for the reply. what I mean is very simple: in the space where we live, I have two Cartesian coordinate sharing the same origin, the direction in system A is (118,2090,1000), while in B is (2,3,3); then the direction (89,2600,1000) in A correspond to which direction in B? this...

hi, all, run into one geometry problem: I have two 3-D Cartesian systems, A and B. they share the same original. the coordinate (2,3,3) in B system is the same vector as (118,2090,1000)in A system( there may be scale difference, but they are the same direction); then what is the vector in B...