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If barb, barc are like unit vectors and ...

If `barb, barc` are like unit vectors and `baraxx (barbxx barc) = bar0` then

A

`bara.barc=barb.barc`

B

`bara.barb=bara.barc`

C

`barb.barcnebarc.bara`

D

`bara.barbnebara.barc`

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The correct Answer is:
B
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AAKASH SERIES-MULTIPLE PRODUCT OF VECTORS-PRACTICE EXERCISE
  1. barixx(barjxxbark)+barjxx(barkxxbari)+barkxx(barixxbarj)=

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  2. barixx(barixxbara)+barjxx(barjxxbara)+barkxx(barkxxbara)=

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  3. If barb, barc are like unit vectors and baraxx (barbxx barc) = bar0 th...

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  4. If bara, barb are two unit perpendicular vectors then baraxx (baraxx b...

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  5. If [baraxx(barbxxbarc)]xxbarc=(bara·barc)barR then barR=

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  6. If bara and barb are unit vectors, then the vector ( bara + barb) xx (...

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  7. If barp is non- · zero vector such that barp. bara= barp. barb = 0 and...

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  8. If (bara xx barb).(barc xx bard) = (bara.barc)(barb.bard) + k(bara.bar...

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  9. If (baraxxbarb)xx(barcxxbard)=[barabarbbard]barc +kbard then k =

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  10. The volume of tetrahedron with edges barixxbarj,barjxxbark,barkxxbari ...

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  11. If bara. barb = barb. barc = barc . bara = 0 then [bara barb barc] =

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  12. If bara,barb are non-zero and non-collinear vectors then [bara barb ba...

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  13. bara is perpendicular to barb,barc. If abs(bara)=2,abs(barb)=3,abs(bar...

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  14. The angle between a,b is 30° and barc is perpendicular to both bara an...

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  15. The P. V. of the points A, B, C, D are 3bari-2barj-bark,2bari+3barj-4b...

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  16. If a(bar(alpha) xx bar(beta)) + b(bar(beta) xx bar(gamma)) +c(bar(gamm...

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  17. baralpha=x(baraxxbarb)+y(barbxxbarc)+z(barcxxbara) and [barabarbbarc]=...

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  18. If bara. barb = barb. barc = barc . bara = 0 then [bara barb barc] =

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  19. Let bara=2bari+barj+bark,barb=bari+2barj-bark and a unit vector barc b...

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  20. Find unit vector orthogonal to the vector 3bari + 2barj + 6bark and co...

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