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| 1. |
If vector R= P+Q and R= P+Q |
| Answer» TION:When, P+Q=R or P−R=−Q(P−R).(P−R)=(−Q).(−Q)P2+R2−2PRcosθ1=Q2cosθ1=1/2 (as P=Q=R)θ1=600When, P+Q+R=0 or P+R=−Q(P+R).(P+R)=(− | |