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vec(a) and vec(b) are non-zero vectors s...

`vec(a) and vec(b)` are non-zero vectors such that `vec(a) xx vec(b)= vec(b) xx vec(a)` " then" `vec(a), vec(b)` are

A

this result is always true

B

this result is impossible

C

parallel to each other

D

perpendicular to each other

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The correct Answer is:
C
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AAKASH SERIES-VECTOR (CROSS) PRODUCT OF TWO VECTORS-Exercise-I
  1. vec(a) and vec(b) are non-zero vectors such that vec(a) xx vec(b)= vec...

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  2. If 13 vec(a)= 3vec(i) + 4vec(j)+ 12vec(k), 13vec(b)= 4vec(i)-12vec(j) ...

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  3. If vec(a)= 2vec(i)-vec(j) +vec(k), vec(b)= 3vec(i) + 4vec(j) -vec(k), ...

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  4. If vec(a)= 2vec(i) -vec(j) + 3vec(k), vec(b)= p vec(i) + vec(j) + q ve...

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  5. If vec(a)= 3 vec(i)- vec(j)-2vec(k), vec(b)= 2vec(i) + 3vec(j) + vec(k...

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  6. If (vec(a), vec(b))= pi, then |4vec(a) xx 5vec(b) + vec(b) xx vec(a)|=

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  7. If |vec(a)|=2, |vec(b)|=4, then (|vec(a) xx vec(b)|^(2))/(1-cos^(2)(ve...

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  8. If theta is th angle between the vector 2i - 2j + 4k and 3i + j + 2k, ...

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  9. If a and b are unit vectors and a xx b = 1, then the angle between a a...

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  10. If vec(a), vec(b) are collinear, then which of the following is false?

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  11. If |vec(a) xx vec(b)|=6, |vec(a)|=6, (vec(a), vec(b))= (pi)/(3), then ...

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  12. A unit vector perpendicular to 2vec(i) + 3vec(j) + 4vec(k) and 3vec(j)...

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  13. If vec(a)= vec(i) + vec(j) + vec(k), vec(b)= -vec(i) + 2vec(j) + vec(k...

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  14. Any vector which is perpendicular to each of the vectors 2vec(i) + vec...

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  15. The area of the triangle formed by thepoints whose position vectors ar...

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  16. The vector area of the triangle formed by the points vec(i) -vec(j) + ...

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  17. If the area of the parallelogram whose adjacent sides are 3 vec(i) - 4...

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  18. The area of the parallelogram whose adjacent sides are 3vec(i) + 2vec(...

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  19. The vector area of the parallelogram whose diagonals are vec(i) + 2vec...

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  20. Two diagonals of a parallelogram are vec(i) + 2vec(j) + 3vec(k) and -2...

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