1.

If veca=2hati-3hatj+4hatk, veca.vecb=2 and veca xx vecb=hati+2hatj+hatk, then vecb is equal to

Answer»

`15hati-8hatj+hatk`
`(1)/(29)(15hati-8hatj+hatk)`
`(1)/(5)(2hati+hatj+hatk)`
`2hati+hatj+hatk`

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