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Let  = arP-1  = arQ-1  = arR-1cos  = (Q-R)log 3 + (R-P)log3 + (P-Q)log3 = 3[(Q-R)log + (R-P)log + (P-Q)log]= 3[(Q-R)logarP-1 + (R-P)logarQ-1 + (P-Q)logarR-1] = 3(Q-R+R-P+P-Q)loga + 3[(P-1)(Q-R)+(Q-1)(R-P)+(R-1)(P-Q)]logr = 0 Hence the angle between the vectors is 900. |
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Bipin Kumar Dubey Chemical Dept. IIT Kharagpur |
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