So im really confused about this problem, im not exactly sure where or how to start it, can someone please help? Consider two displacements, one of magnitude 2.3 m and another of magnitude 3.9 m. What angle between the directions of this two displacements give a resultant displacement of magnitude (a) 5.1 m, (b) 3.0 m, and (c) 3.3 m.