Saved Bookmarks
| 1. |
If vector A+vector B= vecto A_vector B ,find the angle between vector A and vector B |
| Answer» A- vector AB- vector B A+B= vector P A-B= vector QP^2 = [A^2 + B^2+ 2ABcosx]-(1)Q^2= [A^2+B^2-2ABcosx] - (2)Given P=Q Therefore, equating both (1)=(2) We get 4ABcosx= 0Now cosx=0Thus the angle between the vectors A, B is x=90 | |