The dir cosines of two lines are related by l+m+n=0 & a(l)^2+b(m)^2+c(n)^2 = 0. the lines are parallel if (find relation b/w a,b,c)

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Sourabh Singh · Answer

Represent one in the form of other two. Then make a quadratic and frame a relationship between the other two in order to get the answer. If dr’s are proportional then the lines are parallel else they are not

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The dir cosines of two lines are related by l+m+n=0 & a(l)^2+b(m)^2+c(n)^2 = 0. the lines are parallel if (find relation b/w a,b,c)

The dir cosines of two lines are related by l+m+n=0 & a(l)^2+b(m)^2+c(n)^2 = 0. the lines are parallel if
(find relation b/w a,b,c)

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The dir cosines of two lines are related by l+m+n=0 & a(l)^2+b(m)^2+c(n)^2 = 0. the lines are parallel if (find relation b/w a,b,c)

The dir cosines of two lines are related by l+m+n=0 & a(l)^2+b(m)^2+c(n)^2 = 0. the lines are parallel if(find relation b/w a,b,c)

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The dir cosines of two lines are related by l+m+n=0 & a(l)^2+b(m)^2+c(n)^2 = 0. the lines are parallel if
(find relation b/w a,b,c)