If (v1+v2) is perpendicular to (v1-v2),then is v1 perpendicular to v2, is v1=v2, is v1 a null vector,can the angle between v1 and v have any value?
If (v1+v2) is perpendicular to (v1-v2),then is v1 perpendicular to v2, is v1=v2, is v1 a null vector,can the angle between v1 and v have any value?