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Write a unit vector in the direction of ` vec b=2 hat i+ hat j+2 hat kdot`

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Unit vector in the direction of `vec b` is,
`={ 2 hat i+ hat j+2 hat k}/sqrt{2^2+1^2+2^2}`
`= {2 hat i+ hat j+2 hat k}/3`
`= 2/3 hat i+1/3hat j+2 /3hat k`
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RD SHARMA-ALGEBRA OF VECTORS-Solved Examples And Exercises
  1. Write a unit vector in the direction of vec a=3 hat i-2 hat j+6 hat k...

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  2. If vec a= hat i+2 hat j-3 hat k\ a n d\ vec b=2 hat i+4 hat j+9 hat ...

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  3. Write a unit vector in the direction of vec b=2 hat i+ hat j+2 hat kd...

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  4. Find the position vector of the mid point of the line segment A B ,\ ...

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  5. Find a vector in the direction of vec a=2 hat i- hat j+2 hat k , whic...

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  6. What is the cosine of the angle which the vector sqrt(2) hat i+ hat j+...

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  7. Write two different vectors having same magnitude.

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  8. Write two different vectors having same direction.

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  9. Write a vector in the direction of vector 5 hat i- hat j+2 hat k which...

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  10. Writhe the direction cosines of the vector hat i+2 hat j+3 hat kdot

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  11. Find a unit vector in the direction of vec a=2 hat i-3 hat j+6 hat k

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  12. For what value of a the vectors 2 hat i-3 hat j+4 hat k\ a n d\ a hat ...

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  13. Writhe the direction cosines of the vectors -2 hat i+ hat j-5 hat kdot

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  14. Find the sum of the following vectors vec a= hat i-2 hat j ,\ vec b=...

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  15. Find a unit vector in the direction of the vector vec a=3 hat i-2 hat...

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  16. If vec a=x hat i+2 hat j-z hat k\ and vec b=3 hat i-y hat j+ hat k a...

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  17. Write a unit vector in the direction of the sum of the vectors vec a=...

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  18. Find the value of ' p ' for which the vectors 3 hat i+2 hat j+9 hat k\...

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  19. Find a vector vec a of magnitude 5sqrt(2) making an angle of pi/4 wit...

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  20. Write a unit vector in the direction of vec (PQ) where PQ are the poi...

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