Let veca=hati + hatj +hatk,vecb=hati- ha...

Let `veca=hati + hatj +hatk,vecb=hati- hatj + hatk and vecc= hati-hatj - hatk` be three vectors. A vectors `vecv` in the plane of `veca and vecb` , whose projection on `vecc is 1/sqrt3` is given by

`hati-3hatj+3hatk`

`-3hati-3hatj-hatk`

`3hati-hatj+3hatk`

`hati+3hatj-3hatk`

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