Question

if the direction cosines of a line are k/3 k/3 k/3 then value of k is

Answer 1

Answer:

ANSWER

since, direction cosines of a line are k,k and k

∴l=k,m=k and n=k

We know that, l

2

+m

2

+n

2

=1

⇒k

2

+k

2

+k

2

=1

⇒k

2

=

3

1

∴k=±

3

1