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If veca=2hati-hatj+hatk and vecb=-2hati+...

If `veca=2hati-hatj+hatk` and `vecb=-2hati+hatk`, then the vector in the direction of `veca+vecb` with magnitude 9 is :

A

`9hatk`

B

`3hatk`

C

`hatk`

D

`6hatk`.

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MODERN PUBLICATION-VECTORS-Exercise
  1. The value of 'lambda' for which the two vectors : 2hati-hatj+2hatk and...

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  2. If |veca|=8,|vecb|=3 and |vecaxxvecb|=12, then value of veca*vecb is :

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  3. If veca=2hati-hatj+hatk and vecb=-2hati+hatk, then the vector in the d...

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  4. If veca and vecb are two collinear vectors, then which of the followi...

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  5. If vecaxxvecb=|veca||vecb|sin theta hatn, which one is correct ?

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  6. If veca*vecb=-|veca||vecb|, then theta=

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  7. The projection of the vector veca=2hati+3hatj+2hatk on the vector vecb...

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  8. The area of triangle having adjacent sides veca and vecb is :

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  9. The magnitude of : veca=3hati+2hatj is :

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  10. If veca=3hati-hatj+2hatk,vecb=hati-3hatk, then veca*vecb is :

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  11. If veca=hati+2hatj+5hatk,vecb=2hati+3hatj, then the value of vecaxxvec...

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  12. Let the vectors veca and vecb be such that |veca|=3 and |vecb|=(sqrt2)...

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  13. For a unit vector veca if (x-veca)*(x+veca)=12, then |x| is equal to :

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  14. Projection of vector veca on other vector vecb is equal to :

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  15. Which of the following is true :

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  16. The angle between the vectors veca and vecb such that |veca|=|vecb|=sq...

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  17. If the points A and B are (1,2,-1) and (2,1,-1) respectively, then vec...

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  18. If veca and vecb are vectors such that |veca|=2,|vecb|=3 and veca*vecb...

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  19. The projection of hati-hatj+hatk on hati-hatj is :

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  20. The angle between veca and vecb if vecaxxvecb=veca*vecb is :

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