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`bara` is perpendicular to `barb,barc`. If `abs(bara)=2,abs(barb)=3,abs(barc)=4(barb,barc)=(2pi)/3` then `abs(barabarbbarc])=`

A

`12sqrt3`

B

12

C

`6sqrt3`

D

6

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The correct Answer is:
A
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AAKASH SERIES-MULTIPLE PRODUCT OF VECTORS-PRACTICE EXERCISE
  1. If bara. barb = barb. barc = barc . bara = 0 then [bara barb barc] =

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

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

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

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

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

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

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

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

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

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  11. Let baralpha=abari+bbarj+cbark,barbeta=bbari+cbarj+abark and bargamma=...

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  12. If barx.bara=barx.barb=barx.barc=0 for some non-zero vector barx and a...

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  13. If bara, barb, barc represents three concurrent edges of a rectangular...

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  14. If bara, barb, barc are three non-coplanar vectors, barp=(barbxxbarc...

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  15. bara,barb,barc are non-coplanar and barl=(barbxxbarc)/([bara barb barc...

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  16. bara.barb^(1)+barb.barc^(1)+barc.bara^(1)=

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  17. Let bara ,barb,barc be non coplanar vectors and bara^(1)=(barbxxbarc)/...

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  18. baraxxbara^(1)+barbxxbarb^(1)+barcxxbarc^(1)=

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  19. The vector [(bari-barj)xx(barj-bark)]xx(bari+5bark) is

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  20. Let bara,barb,barc be three vectors which satisfy baraxx(barbxxbarc)=(...

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