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The vectors from origin to the points A and B are `vecA=3hati-6hatj+2hatk` and `vecB=2hati+hatj+2hatk` respectively. The are of triangle `OAB` be

A

`5/2 sqrt(17)` sq. unit

B

`2/5 sqrt(17)` sq. unit

C

`3/5sqrt(17)` sq. unit

D

`5/3sqrt(17)` sq. unit

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ERRORLESS -VECTORS-Exercise
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  2. A force F=-K(yhati+xhatj) (where K is a positive constant) acts on a p...

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  3. The vectors from origin to the points A and B are vecA=3hati-6hatj+2ha...

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  4. A metal sphere is hung by a string fixed to a wall. The sphere is push...

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  5. A boat having a speed of 5km//hr. in still water, crosses a river of w...

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  6. A man crosses a 320m wide river perpendicular to the current in 4 min....

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  7. Assertion: vecAxxvecB is perpendicular to both vecA+vecB as well as ve...

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  8. Assertion: Angle between hati+hatj and hati is 45^(@). Reason: hati...

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  9. Assertion: If theta be the angle between vecA and vecB then tan theta=...

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  10. Statement-1:If ,|vec A+vec B| =|vecA-vecB| then angle between vecA an...

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  11. Assertion: Vector product of two vectors is an axial vector. Reason:...

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  12. Assertion: Minimum number of non-equal Vectors in a plane required to ...

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  13. Assertion: Relative velocity of A w.r.t B is greater than the velocity...

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  14. Assertion: Vector addition of two vectors vedA and vecB is commutative...

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  15. Assertion: vecA.vecB=vecB.vecA Reason: Dot product of two vectors is...

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  16. Assertion: vectau=vec(r)xxvec(F) and vectau!=vec(F)xxvec(r ) Reason:...

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  17. A positive acceleration of a body can be associated with a slowing dow...

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  18. Assertion: A physical quantity cannot be called as a vector if its mag...

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  19. Assertion: The some of two Vectors can be zero. Reason: The vector c...

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  20. Assertion: Two vectors are said to be like vectors if they have same d...

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