# 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

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

#### Solution

the unit vector along the line

Concept: Vectors and Their Types
Is there an error in this question or solution?