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Let ` vec a= hat i+2 hat ja n d vec b=2 hat i+ hat jdoti s |vec a|=| vec b|?` Are the vectors ` vec aa n d vec b` equal?

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Given ,
`a⃗ =i+2j` and `b⃗=2i+j`
`|a⃗ |=sqrt(1^2+2^2) =sqrt5`
`∣b⃗ ∣=sqrt(2^2+1^2) =sqrt5`
Then , `|a⃗ |=∣b⃗ ∣`
...
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