If l,m,n be the d.c of any line then which of the following is true(a) – InterviewSolution

1.	If l,m,n be the d.c of any line then which of the following is true(a) l + m + n = 1(b) l2 + m2 + n2 = 1(c) √(l2 +m2 + n2) = 0(d) none of these
Answer» Answer is (b) l²+ m² + n² = 1

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