Hey. I'm currently learning about vectors and i have come to a point where im just plain stuck. This may be a stupid question but i dont get it. Now say u have 2 vectors and u need to get there components (the vectors are A and B) so u have Ax = A cos theta Bx = A cos thetax Ay = A sin theta By = A sin thetax assuming that neither have any negative components What i dont understand is if there is a vector in 3-d space how do u get Az and Bz i mean even if u were working in x-y plane but finding the product of A x B the formulas for C Components are Cx = AyBz - AzBy Cy = AzBx - AxBz Cz = AxBy - AyBx and u need that Z-component for both A and B I would appreciate any help u could give me. Thanks in advance.