`vec(P)+vec(Q)` is a unit vector along x-axis. If `vec(P)= hat(i)-hat( – InterviewSolution

1.	`vec(P)+vec(Q)` is a unit vector along x-axis. If `vec(P)= hat(i)-hat(j)+hat(k)`, then what is `vec(Q)`?A. `hat(i)+hat(j)-hat(k)`B. `hat(j)-hat(k)`C. `hat(i)+hat(j)+hat(k)`D. `hat(j)+hat(k)`
Answer» Correct Answer - B (b) Given `P+1=hat(i)-hat(j)+hat(k)` and `P+Q=hat(i)-hat(i)+hat(j)+hat(k)=hat(j)-hat(k)`

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