Question
Which of the following represents direction cosines of the line :
(a)`0,1/sqrt2,1/2`
(b)`0,-sqrt3/2,1/sqrt2`
(c)`0,sqrt3/2,1/2`
(d)`1/2,1/2,1/2`
Solution
Ans. (C)
`l^2+m^2+n^2`
`=(0)^2+(sqrt3/2)^2+(1/2)^2`
`=3/4+1/4=1`
Is there an error in this question or solution?
APPEARS IN
Solution Which of the Following Represents Direction Cosines Of The Line Concept: Direction Cosines and Direction Ratios of a Line.
