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If θ is the angle between two proper vec...

If `θ` is the angle between two proper vectors `vec a` and `vec b`, then `vec a*vec b lt 0` then

A

`0 le θ le pi`

B

`0 le θ le pi/2`

C

`pi/2 le θ le pi`

D

none of these

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PRADEEP PUBLICATION-VECTORS-EXERCISE
  1. The value of λ for which the vectors 3 hat i-6hat j +hat k and 2 hat i...

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  2. If vec a and vec b are non-collinear proper vectors then number of uni...

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  3. If θ is the angle between two proper vectors vec a and vec b, then vec...

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  4. If vec a is any vector, then vec a*vec a

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  5. For any vector, vec a, vec a xx vec a

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  6. The vector having initial and terminal points as (2,5,0) and (-3,7,4) ...

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  7. The angle between two vectors vec a and vec b with Magnitudes sqrt3 an...

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  8. The value of λ for which the vectors vec a= 2 hat i+λ hat j+hat kand v...

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  9. Find the angle between the vectors hat i-hat j and hat j-hat k.

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  10. The vector with initial point P(2,-3,5) and terminal point Q(3,-4,7) i...

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  11. If vec a * vec a=0 thenvec a is a

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  12. If vec a and vec b are proper vectors such that vec b= λ veca for some...

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  13. For any two vectors vec a and vec b, which of the following is not tru...

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  14. The area of the parallelogram whose adjacent sides are hat i+hat k and...

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  15. If the vectors from the origin to the points A and B are . vec a= a ha...

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  16. Given |quad vec a|=10,|quad vec b|=2 and vec a *vec b=12, find | vec a...

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  17. Direction cosines of hat i are ‘

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  18. The vectors -2 hat i+hat j +2 hatk, hat i+ λ hat j- hatk, 2hat i- hat...

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  19. If vec a,vec b,vec c are unit vectors such that vec a+vec b+ vec c= ve...

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  20. If |vec a|=8, |vec b|=3 and |vec axx vec b|=12, then the value of vec ...

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