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If bara,barb are two units vectors incli...

If `bara,barb` are two units vectors inclined at an angle `pi/3` then `{axx(barb+baraxxbarb)}.barb`=

A

`(-3)/4`

B

`1/4`

C

`3/4`

D

`1/2`

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The correct Answer is:
A
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AAKASH SERIES-MULTIPLE PRODUCT OF VECTORS-EXERCISE -II
  1. Let bara=2bari+barj-2bark,barb=bari+barj. If barc is a vector such tha...

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  2. If baraxx(barbxxbarc)=(baraxxbarb)xxc' then which of the following is ...

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  3. If bara,barb are two units vectors inclined at an angle pi/3 then {axx...

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  4. sum[(baraxxbari)xxbarj]^(2)=

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  5. [barb barc barbxxbarc]+{barb.barc}^(2)=

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  6. If bara=bari+barj-bark,barb=bari-barj+bark,barc is a unit vector perpe...

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  7. (barbxxbarc).(axxbard)+(barcxxbara).(barbxxbard)+(baraxxbarb).(barcxxb...

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  8. If bara is parallel to barbxxbarc then (baraxxbarb).(baraxxbarc))=

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  9. If bara, barb lie in a plane, normal to the plane containing barc, bar...

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  10. [(baraxxbarb)xx(barbxxbarc)(barbxxbarc)xx(barcxxbara)(barcxxbara)xx(ba...

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  11. If barA=baraxxbarb,barB=barbxxbarc,barC=barcxxbara then barAxx(barBxxb...

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  12. Given that barc is in the plane of bara, barb and bard is not iri the ...

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  13. [barbxxbarcbarcxxbarabaraxxbarb]=[barabarbbarc]^(k) then k=

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  14. If bara, barb, barc are non-coplanar, non zero vectors then (baraxxbar...

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  15. [barb barc bard]bara-[bara barc bard]barb+[bara barb bard]barc-[bara b...

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  16. (baraxxbari).(barjxxbark)+(baraxxbarj).(barkxxbari)+(baraxxbark).(bari...

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  17. If bara, barb, barc, bard are any four vectors then (baraxx barb) xx (...

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  18. If bara,barb,barc are coplanar vectors then (baraxxbarb)xx(barbxxbarc)...

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  19. If bara, barb, barc are any three vectors such that baraxxbarb=barc, b...

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  20. If bara,barb, barc are vectors such that [barabarbbarc]=4 then [baraxx...

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