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Given $A = 3 \hat{i} + 4 \hat{j}$ and $B = 6 \hat{i} + 8 \hat{j}$ , which of the following statement is correct?

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A×B=0

|A||B|=13

|A| = 15

A·B=48

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detailed solution

Correct option is A

|A|=9+16=5and |B|=36+64=10.B=2A or B is parallel to A. Ratio of their coefficients are equal, so they are parallel or their cross product is zero.

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Given A=3i^+4j^ and B=6i^+8j^, which of the following statement is correct?

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Given $A = 3 \hat{i} + 4 \hat{j}$ and $B = 6 \hat{i} + 8 \hat{j}$ , which of the following statement is correct?