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Write the direction ratios of the vector...

Write the direction ratios of the vector ` -> a= hat i+ hat j-2 hat k` and hence calculate its direction cosines.

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The correct Answer is:
`=-(2)/(sqrt(6)`
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  13. If vec(a) and vec(b) are perpendicular vectors such that |vec(a)+vec(b...

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  14. Find the projection of the vector hat i+3 hat j+7 hat k on the vector...

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  15. Find lambda, when the projection of vec a=lambda hat i+ hat j+4 hat k...

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  16. If vec a and vec b are two unit vectors such that vec a+ vec b is a...

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  17. Find | vec x| , if for a unit vector vec a ,\ ( vec x-\ vec a)dot( v...

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