Q 1113578449.     Let `veca` be a unit vector, `vecb=2hati+hatj-hatk` and `vecc=hati+3hatk`.Then, maximum value of `[veca" "vecb" "vecc]` is



EAMCET 2008
A

`-1`

B

`sqrt10+sqrt6`

C

`sqrt10-sqrt6`

D

`sqrt59`

HINT

Use `[veca" "vecb" "vecc]=veca*(vecbxxvecc)`
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