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The two vectors hat j+ hat k and 3 hat ...

The two vectors ` hat j+ hat k` and `3 hat i- hat j+4 hat k` represent the two sides `A B` and `A C` , respectively of a ABC. Find the length of the median through A.

A

`(sqrt(34))/(2)`

B

`(sqrt(48))/(2)`

C

`sqrt(18)`

D

`sqrt(34)`

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The correct Answer is:
A
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NAVNEET PUBLICATION - MAHARASHTRA BOARD-QUESTION BANK 2021-VECTOR AND THREE DIMENSIONAL GEOMETRY
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  3. The two vectors hat j+ hat k and 3 hat i- hat j+4 hat k represent the...

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  5. Find the coordinates of the point which is located, three units behind...

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  6. A(2, 3), B(-1, 5), C(-1, 1) and D(-7, 5) are four points in the Cartes...

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  7. Find a unit vector in the opposite direction of bar(u). Where bar(u) =...

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  8. The non zero vectors bar(a) and bar(b) are not collinear find the valu...

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  9. If bar(a) = 4 hat(i) + 3 hat(k) and bar(b) = - 2 hat(i) + hat(j) + 5 ...

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  10. Find the distance from (4, -2, 6) to the XZ-Plane.

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  11. If the vectors 2 hat(i) - q hat(j) + 3 hat(k) and 4 hat(i) - 5 hat(j)...

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  12. Find bar(a). bar(b) xx bar(c), if bar(a) = 3 hat(i) - hat(j) + 4 hat(k...

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  13. If a line makes angle 90o, 60oand 30owith the positive direction of ...

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  14. The vector bar(a) is directed due north and |bar(a)| = 24. The vector ...

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  15. Show that following points are collinear P(4, 5, 2), Q(3, 2, 4), R(5, ...

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  16. If a vector has direction angles 45^(@) and 60^(@) find the third dire...

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  17. If bar(c) = 3 bar(a) - 2 bar(b) then prove that [(bar(a),bar(b),bar(c...

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  18. If |bar(a).bar(b)| = |bar(a) xx bar(b)| & bar(a). bar(b) lt 0, then fi...

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  19. The direction ratios of a vector perpendicular to the two lines whose ...

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  20. If bar(a), bar(b) and bar(c) are position vectors of the points A, B, ...

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