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If A and B are two vectors such that |A+...

If A and B are two vectors such that |A+B|=2|A-B|. The angle between vectors A and B is

A

`45^(@)`

B

`60^(@)`

C

`30^(@)`

D

date insufficient

Text Solution

Verified by Experts

The correct Answer is:
D
(d) We have, `|A+B|=2|A-B|`
`:.sqrt(A^(2)+B^(2)+ABcostheta)=2sqrt(A^(2)+B^(2)-2ABcostheta)`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-SCALARS AND VECTORS -Exercise 1
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  4. If |A|=2 and |B|=4 and angle between then is 60^(@) then |A-B|

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  9. what is the dot product of two vectors of magnitudes 3 and 5,if angle ...

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  10. When A.B =-|A||B|, then

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  11. The condition (a.b)^(2)=a^(2)b^(2) is satisfied when

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  12. The modulus of the vector product of two vectors is (1)/(sqrt(30)) tim...

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  13. In a clockwise system,

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  14. If |AxxB| = sqrt3 A.B, then the value of |A+B| is

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  15. If |A|=2,|B|=5 and |AxxB|=8. Angle between A and B is acute, then (A....

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  16. Find the torque of a force F=-3hat(i)+2hat(j)+hat(k) acting at the po...

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  17. What is the unit vector perpendicular to the following Vector 2hat(i)+...

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  18. If AxxB=BxxA then the angle between A and B is

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  19. What is the value of linear velocity, if vec(omega) = 3hat(i)-4 hat(j)...

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  20. The area of the parallenlogram determined by two adjacentt sides as A=...

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