Question

With respect to a rectangular cartesian coordinate system,
three vectors are expressed as a =4i-i, b=-31 +23 and
c=-k where i, j, k are unit vectors, along the X, Y and Z-
axis respectively. The unit vectors i along the direction of
sum of these vector is
[Kerala CET (Engg.) 2003)
(a) = 7pi+3=)
10 = 56-j+6)
(b) = + (6 +)
(d) = +j+k)​

Answer 1

Answer:

answer is (a)=7pi+3=)10=56-j+6)