HSC Arts 12th Board ExamMaharashtra State Board
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# Which of the Following Represents Direction Cosines Of The Line - HSC Arts 12th Board Exam - Mathematics and Statistics

ConceptDirection Cosines and Direction Ratios of a Line

#### 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

2013-2014 (March) (with solutions)
Question 1.1.1 | 2.00 marks
Solution Which of the Following Represents Direction Cosines Of The Line Concept: Direction Cosines and Direction Ratios of a Line.
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