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Let O be the origin and let A(-8,3) be a...

Let O be the origin and let A(-8,3) be a point in xy plane. Express `vec(OA)` in terms of vector `vechati`and `hatj`, Also, find `|vec(OA)|`

Text Solution

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The position vector of point A is `-8hatj+3hatj`
`:. vec(OA)=-8hatj+3hatj`
`rArr |vec(OA)|=sqrt((-8)^(2)+(3)^(2))=sqrt(73)`
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