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Let veca=2hati+hatj-2hatk and vecb=hati+...

Let `veca=2hati+hatj-2hatk and vecb=hati+hatj`. Let `vecc` be a vector such that `|vecc-veca|=3,|(vecaxxvecb)xxvecc|` = 3 and the angle between `vecc and veca xx vecb ` is `30^@` Find `veca.vecc`

A

2

B

5

C

`1/8`

D

`25/8`

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A
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