1.

If bara,barb,barc are coplanar vectors then (baraxxbarb)xx(barbxxbarc)+(barbxxbarc)xx(barcxxbara)+(barcxxbara)xx(baraxxbarb)=

Answer»

`BAR0`
`[BARABARBBARC]`
`[barabarbbarc](bara+barbbarc)`
`bara+barb+barc`

ANSWER :A


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