Question

what vector must be added to the sum of two vectors
2i^-j^+3k^ and 3i^-2j^-2k^.so that the resultant is a unit vector
along z-axis​

Answer 1

Answer:

(2 i - j + 3 k) + (3 i - 2 j - 2 k) = (3 + 2) i - (-1 -2) j + (3 - 2) k

= 5 i - 3 j + k

So  adding  -5 i + 3 j     gives a unit  vector alone the z-axis