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If vec(P) = hat(i) + hat(j) + hat(k), it...

If `vec(P) = hat(i) + hat(j) + hat(k)`, its direction cosines are

A

1,1,1

B

`1//sqrt(3), 1//sqrt(3), 1//sqrt(3)`

C

`sqrt(3), sqrt(3), sqrt(3)`

D

0,0,0

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The correct Answer is:
B
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AAKASH SERIES-MOTION IN A PLANE -Practice Exercise
  1. Given two vectors vec(A) = hat(i) - 2hat(j) - 3hat(k) and vec(B) = 4ha...

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  2. If the two directional cosines of a vectors are (1)/(sqrt(2)) and (1)/...

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  3. If vec(P) = hat(i) + hat(j) + hat(k), its direction cosines are

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  4. If vec(A) = 2hat(i) - 3hat(j) + 4hat(k) its component in xy plane is

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  5. The unit vector parallel to the resultant of the vectors vec(A) = 4hat...

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  6. A vector hat(i) + sqrt(3) hat(j) rotates about its tail through an ang...

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  7. If the angle between two vectors of equal magnitude P is theta, the ma...

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  8. Two forces are in the ratio of 5:2. The maximum and minimum of their r...

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  9. Two equal forces of magnitude .p. each are angled first at 60^(@) late...

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  10. Three vectors vec(P), vec(Q), vec(R) obey vec(P) + vec(Q) = vec(R) and...

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  11. The resultant of two forces 2 N and 3 N is sqrt(19) N. The angle betw...

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  12. Twelve forces each of 5 N act on a body simultaneously. If each force ...

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  13. Which of the following sets of forces acting simultaneously on a parti...

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  14. The resultant of two forces, one double the other in magnitude is perp...

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  15. If the difference of two unit vectors is also a vector of unit magnitu...

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  16. The resultant of two vectors vec(A) & vec(B) is vec(C). If direction o...

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  17. The greater and least resultant of two forces are 9 N and 5 N respecti...

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  18. The resultant of two forces at right angles is 13N. The minimum result...

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  19. Given that vecA + vecB + vecC=0 out of three vectors two are equal in...

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  20. A 10 kg wt is suspended as shown below then tension T(1) & T(2) are

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