Maharashtra State BoardHSC Arts 12th Board Exam
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Select the correct option from the given alternatives: If l, m, n are direction cosines of a line then li^+mj^+nk^ is ______ - Mathematics and Statistics

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MCQ
Fill in the Blanks

Select the correct option from the given alternatives:

If l, m, n are direction cosines of a line then `"l"hat
"i" + "m"hat"j" + "n"hat"k"` is ______ 

Options

  • null vector

  • the unit vector along the line

  • any vector along the line

  • a vector perpendicular to the line

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Solution

the unit vector along the line

Concept: Vectors and Their Types
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