Multiple Choices
(Choose 1 answer)
(i) {X+Y, X-Y}
Let {X,Y} be an orthogonal set with ||X||=||Y||=1. Which of the following sets are orthogonal?
(ii) {X+2Y, X-Y}
A. Only (i) is orthogonal
B. Not enough information
C. None of (i) and (ii) is orthogonal
D. Only (ii) is orthogonal
E. Both (i) and (ii) are orthogonal
