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UP TGT Mathematics Vector Analysis Test Series - Part 5

For a unit vector, direction cosines l,m,n satisfy

Type: MCQ • Marks: 1
For a unit vector, direction cosines l,m,n satisfy
Options
A. l+m+n=1
B. l²+m²+n²=1
C. lmn=1
D. l+m+n=0
Explanation
Direction cosines always satisfy l²+m²+n²=1.
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