If vectors →A,→B and →C have magnitudes 5,12 and 13 units and →A+→B=→C, then the angle between →B and →C is
If vectors P, Q and R have magnitude 5, 12 and 13 units and →P+→Q=→R, the angle between Q and R is
The magnitude of vector →A,→B and →C are respectively 12, 5 and 13 units and →A+→B=→C then the angle between →A and →B is
The magnitudes of vectors →A,→Band→C are 3, 4 and 5 units respectively. If →A+→B=→C, the angle between →A and →B is