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Given A= 3hati+4hatj and B=6hati+8hatj ...

Given `A= 3hati+4hatj and B=6hati+8hatj ` which of the following statement is correct ?

A

`AxxB=0`

B

`(|A|)/(|B|)=(1)/(2)`

C

`|A|=15`

D

`A.|B|=48`

Text Solution

Verified by Experts

The correct Answer is:
A,B
`(a,b)|A|=sqrt(9+16)=5 and |B|=sqrt(36+54)=10B=2AorB` is parallel to A ratio fo their coefficients are equal ,so they are parallel Or their cross product is zero.
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