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Grade: 12th pass
        
Prove that the lines whose direction cosines are given by the relations al+bm+cn=0 and lm+mn+ln=0 are perpendicular if (1/a)+(1/b)+(1/c)=0.
3 years ago

Answers : (1)

Sourabh Singh
IIT Patna
askIITians Faculty
2104 Points
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3 years ago
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