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Write a unit vector in the direction of ` vec a=3 hat i-2 hat j+6 hat kdot`

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Unit vector in the direction of `vec a` is,
`={ 3 hat i-2 hat j+6 hat k}/sqrt{3^2+(-2)^2+6^2}`
`= {3 hat i-2 hat j+6 hat k}/7`
`= 3/7 hat i-2/7 hat j+6 /7hat k`
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RD SHARMA-ALGEBRA OF VECTORS-Solved Examples And Exercises
  1. If vec a=3 hat i- hat j-4 hat k ,\ vec b=-2 hat i+4 hat j-3 hat k\ a...

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  2. A unit vector vec r makes angle pi/3\ a n d\ pi/2 with hat j a n d\ ...

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

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

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

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

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

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  9. Write two different vectors having same magnitude.

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  10. Write two different vectors having same direction.

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

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

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

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

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

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

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

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

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