I went through some old vector problems and did over 100 but I couldn't get my hands on this one, thanks for taking your time to help me out. Problem: If vectors A and B are added, the resultant has magnitude A. If the two are subtracted, the resultant has a magnitude 2A. If A = 4 what is B and what is the angle between the two vectors. Solve using triangles and the law of sinces/cosines, and also solve using the component approach. Thanks much.