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Questions  

Vectors A,B and C are such thatA·B=0 and A·C=0 Then the vector parallel to A is

a
A→×B→
b
B→+C→
c
B→×C→
d
B→ and C→

detailed solution

Correct option is C

Vector triple product of three vectors A→,B¯ and C¯ is  A→×(B→×C→)=(A→·C→)B→-(A→·B→)C→  Given :A→·B¯=0,A→·C→=0 ∴A→×(B¯×C→)=0  Thus the vector A→ is parallel to vector B→×C→ .

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