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

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

A

3i+j-3k

B

4i+j-4k

C

i+j-2k

D

4i-j+4k

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The correct Answer is:

D

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