Two vectors A→and B→ are such that A→+B→=A→-B→. The angle between the vectors A→ and B→ is :

Two vectors Aand B are such that A+B=A-B. The angle between the vectors A and B is :

  1. A

    0

  2. B

    π/3

  3. C

    π/2

  4. D

    π

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    Solution:

    A+B=AB        A2+B2+2ABcosθ=A2+B2-2ABcosθ        cosθ=0        θ=π2.

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