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Determine the area of parallelogram whos...

Determine the area of parallelogram whose adjacent sides are the vector `2hati,hatj`

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Let `veca` = `2hati` and `vecb` = `hatj`
Then area of the parallelogram whose adjacent sides are `veca` and `vecb` = `|vecaxxvecb|`
= `|2hatixxhatj|` = `|2hatk|` = 2 sq. units
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