How do you represent vectors in a 3D space?

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phy-79
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I have problems in understanding what RECIPROCAL VECTORS are...
I know the formulas regarding it but don't know their geometric meaning is...
How do you represent them in a 3D spcace ?
 
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phy-79 said:
I have problems in understanding what RECIPROCAL VECTORS are...
I know the formulas regarding it but don't know their geometric meaning is...
How do you represent them in a 3D spcace ?

Moved to Homework Help, Advanced Physics for now. Could you please say more about what you know about "reciprocal vectors"?