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Let eveca=hati+hatj-hatk, vecb=hati-hatj...

Let `eveca=hati+hatj-hatk, vecb=hati-hatj+hatk and vecc ` be as unit vector perpendicular to veca and vecb` the `vecc=` (A) `1/sqrt(j+k)` (B) `1/sqrt(2)(j-k)` (C) `1/sqrt(6) (i-2jk)` (D) `1/sqrt(6) (2i-j+k)`

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