Q.
For two vectors A→ and B→, it is given that |A→+B→|=|A→−B→| then vectors A→ and B→ are
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a
Parallel to each other
b
Perpendicular to each other
c
Ant parallel to each other
d
None of these
answer is B.
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Detailed Solution
|A→+B→|=|A→−B→||A→+B→|2=|A→−B→|2 A2+B2+2Abcosθ=A2+B2−2ABcosθ4ABcosθ=0,cosθ=0⇒θ=900∴A→⊥B→