MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Direction Cosines

If 1, m , n a...

Question

If l, m, n are the direction cosines of any line, then sum of the squares of the direction cosines of the line is always

A

1

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

-1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

√3

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

0

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A
1

Suggest Corrections

thumbs-up

0

Similar questions

\frac{1}{c}, \frac{1}{c}, \frac{1}{c}

are direction cosines of a line, then the values of c are _______________.

Q. Assertion :If

cos α, cos β

cos γ

are the direction cosines of any line segment, then

{cos}^{2} α + {cos}^{2} β + {cos}^{2} γ = 1

cos α, cos β

cos γ

are the direction cosines of a line segment, then

cos 2 α + cos 2 β + cos 2 γ = - 1

.

Q. Direction cosines

l, m, n

of two lines are connected by the equation

l - 5 m + 3 n = 0

7 l^{2} + 5 m^{2} - 3 n^{2} = 0

. The direction cosines of one of the lines are

Q. If the direction cosines of a line are l, m and n then which of the following is true?

Q. If l,m,n are the direction cosines of the line then magnitude of the line

l ¯ i + m ¯ j + n ¯ k

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Direction Cosines and Direction Ratios

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Direction Cosines

Standard XII Mathematics

Join BYJU'S Learning Program

CrossIcon