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Find the projection of the vector veca=3...

Find the projection of the vector `veca=3hati+2hatj-4hatk` on the vector `vecb=hati+2hatj+hatk`.

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The projection of the vector `veca` on the vector `vecb` is given by
`(1)/(|vecb|)(veca.vecb)=(3+4-4)/(sqrt(6))`
`=(3)/(sqrt(6))=(1)/(2)sqrt(6)`
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