Q.

The direction cosines of a line equally inclined to three mutually perpendicular lines having direction cosines as l1,m1,n1;l2,m2,n2 and l3,m3,n3 are

see full answer

Want to Fund your own JEE / NEET / Foundation preparation ??

Take the SCORE scholarship exam from home and compete for scholarships worth ₹1 crore!*
An Intiative by Sri Chaitanya

a

l1+l2+l3,m1+m2+m3,n1+n2+n3

b

l1+l2+l33,m1+m2+m33,n1+n2+n33

c

l1+l2+l33,m1+m2+m33,n1+n2+n33

d

l1+l2+l39,m1+m2+m39,n1+n2+n39

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Since the three lines are mutually perpendicular,l1l2+m1m2+n1n2=0l2l3+m2m3+n2n3=0l3l1+m3m1+n3n1=0
Watch 3-min video & get full concept clarity
score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon