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If the projection of the vector bari+bar...

If the projection of the vector `bari+barj+bark " on the vector " abari+barj+2bark " is " 5//3`, then a =

A

7

B

0

C

`1//2`

D

2

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The correct Answer is:
D
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AAKASH SERIES-DOT PRODUCT OF TWO VECTORS-PRACTICE EXERCISE
  1. Let bara= 4bari-3barj+5bark . A vector b is coplanar with bari, barj ...

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  2. The component of 5bari-3barj+bark " on " 2bari+barj+2bark is

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  3. If the projection of the vector bari+barj+bark " on the vector " abari...

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  4. Let bara= 2bari+3barj+k,barb = 4bari+barj and bari = bari - 3barj-bark...

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  5. Let bara =2bari+3barj-bark, barb=bari-2barj+3bark. bare is a vector p...

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  6. If bare(1),bare(2) and bare(3) are non-coplanar unit vectors and alp...

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  7. In DeltaABC, " if " BC = a, CA = b and AB = C, " then what is the valu...

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  8. If a,b,c,d are the vertices of a rhombus, then

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  9. The angle between the diagonals of a parallelogram with the vectors 2b...

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  10. If bar(AB)=2bara+barb and bar(AD) = bara-2barb " where " absbara=1, ab...

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  11. bara=bari-barj+3bark , barb =3bari-5barj+6bark. " the magnitude of the...

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  12. The projection of vector bari+barj+bark " on the line whose vector equ...

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  13. Let bara =bari+2barj+bark, barb=bari-barj+bark, barc=bari+barj-bark. A...

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  14. The foot of the perpendicular drawn from a point with position vector ...

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  15. In the Parallelogram ABCD, bar(AC)^(2)-bar(BD)^(2) =

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  16. The vector equation of the plane which is perpendicular to 2bari+3barj...

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  17. The cartesian equation of the plane which is at distance of 10 unit fr...

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  18. Vector equation of the plane through the origin and perpendicular to ...

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  19. The angle between the planes barr.(2bari+barj+bark)=5, (bari-barj+2ba...

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  20. If the planes 3x+4y+mz-26=0, 4x-3y-z-1=0 are perpendicular, then m =

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