Unit vector in the direction of the resultant of vectors `A=-3hati-2hatj-3hatk and B = 2hati + 4hatj + 6hatk` is.
Options:
(a) (-3 hati + 2 hatj-3 hatk)/(sqrt(14))`
(b) `-hati + 2hatj+ 3hatk`
(c) `(-hati+2hatj+3hatk)/(sqrt(14))`
(d) `- 2hati - 4hatj + 8hatk`