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The angle between the vectors 2i+3j+k an...

The angle between the vectors `2i+3j+k and 2i-j-k` is

A

`pi//2`

B

`pi//4`

C

`pi//3`

D

0

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The correct Answer is:
A
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ML KHANNA-ADDITION AND MULTIPLICATION OF VECTORS -Self Assessment Test (MULTIPLE CHOICE QUESTIONS)
  1. If theta be the angle between the vectors 4(i-k) and i+j+k, then theta...

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  2. If theta be the angle between the vectors i+jandj+k, then theta is

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  3. The angle between the vectors 2i+3j+k and 2i-j-k is

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  4. If a and b are two unit vectors, then a xx b is a unit vector if ........

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  5. If [ i,j,k] be orthogonal set of unit vectors, then fill in the blanks...

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  6. [abc] is the scalar triple product of three vectors a, b and c then [a...

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  7. If theta is the angle between vectors a and b, then |a xx b| = | a.b|,...

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  8. a xx (b xx c) is equal to

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  9. u = a xx (b xx c) + b xx (c xx a) + c xx (a xxb) then

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  10. If a = 4i + 2j-5k, b =-12i-6j+15k, then the vectors a, b are

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  11. If the position vector of three points are a - 2b + 3c, 2a + 3b - 4c, ...

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  12. If a + b + c = 0, |a| = 3, |b| = 5, |c| = 7, then the angle between a ...

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  13. If the vectors a,b,c satisfy the condition a+b+c =0, the value of a.b ...

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  14. If veca , vecb , vec c are any three coplanar unit vectors , then :

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  15. If a.b = a.c and veca xx vecb =veca xx vecc, then

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  16. The vector 2i+j-k is perpendicular to i-4j+lambdak if lambda is equal ...

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  17. The vector 2i + 3j - 4k and ai + bj + ck are perpendicular if

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  18. If a and b are position vectors of A and B respectively the position v...

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  19. a and b are the position vectors of the points A and B with respect to...

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  20. If A = 2i + 2j-k, B = 6i-3j+2k, then A xx B will be given by

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