CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

If a,b,c are three non coplanar non zero vectors, then (aa)b×c+(ab)c×a+(a.c)a×b is equal to

A
[b c a]a
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
[c a b]b
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
[a b c]c
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
None of these
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A [b c a]a
Let (a.a)b×c+(ab)c×a+(ac)a×b=x
Now
xa=(aa)[abc]
xb=(ab)[abc]
xc=(a.c)[abc]
Adding the three equations, we get
x(a+b+c)=a(a+b+c)[abc]
x=[a b c]a[bca]a

Hence, option A.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Scalar Triple Product
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon