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The unit vector parallel to the resultan...

The unit vector parallel to the resultant of the vectors `vecA=4hati+3hatj+6hatk` and `vecB=-hati+3hatj-8hatk` is

A

`(1)/(7)(3hati+6hatj-2hatk)`

B

`(1)/(7)(3hati+6hatj+2hatk)`

C

`(1)/(49)(3hati+6hatj-2hatk)`

D

`(1)/(49)(3hati-6hatj+2hatk)`

Text Solution

Verified by Experts

The correct Answer is:
A
`hatn=(vecA+vecB)/(|vecA+vecB|)`,
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NARAYNA-VECTORS-LEVEL-I (H.W)
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  13. If a vector vecA=2hati=2hatj+3hatk, and vecB=3hati=6hatj+nhatk, are pe...

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  14. A vector parallel to the vector (hati+2hatj) and having magnitude 3sqr...

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  15. If vecA=5hati-2hatj+3hatk and vecB=2hati+hatj+2hatk, component of vecB...

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  16. If the vectors vecA=ahati+hatj-2hatk and vecB=ahati-ahatj+hatk are per...

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  17. When a force (8hati+4hatj) newton displaces a particle through (3hati-...

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  18. If veca and vecb are two unit vectors and the angle between them is 60...

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  19. If vecF=2hati+3hatj-hatk and vecr=hati-hatj+6hatk find vecrxxvecF

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  20. Two sides of a triangle are given by hati+hatj+hatk and -hati+2htj+3ha...

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