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If a,b,c are vector of length 4,4,5 resp...

If a,b,c are vector of length 4,4,5 respectively and a,b,c are perpendicular to b+ c , c + a, a+ b respectively, then |a + b + c| =

A

`sqrt(57)`

B

`sqrt(75)`

C

`sqrt(47)`

D

7

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The correct Answer is:
A
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DIPTI PUBLICATION ( AP EAMET)-PRODUCTS OF VECTORS-Exercise 1A
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  2. If A.(B+ C) = B. (C + A) = C. (A + B) = 0, |A| = 3, |B| = 4, |C| = 5 t...

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  3. If a,b,c are vector of length 4,4,5 respectively and a,b,c are perpend...

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  4. Let u,v,w be such that |u| = 1, |v| = 2, |w| = 3. If the projection v ...

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  11. If a,b,c are three mutally perpendicular vectors such that |a| = |b|...

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  12. If three unit vectors a,b,c satisfy a + b + c = 0 then the angle betwe...

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  13. In the parallelogram ABCD, overline(AC)^(2)- overline(BD)^(2) =

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  14. In the parallelogram ABCD, overline(AD)^(2) - overline(AB)^(2) =

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  15. If a,b are unit vectors such that the vector a + 3b is perpendicular t...

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  16. P.T the smaller angle theta between any two diagonals of a cube is giv...

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  17. The angle between a diagonal of a cube and the diagonal of a face of t...

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  18. The cartesian equation of the plane passing through A and perpendicula...

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  19. The cartesian equation of the plane passing through A and perpendicula...

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  20. If A = (1,3, - 5) and B = (3,5, - 3) then the vector equation of the p...

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