Problem 3.10: Rotated Axes

How are the axes Px₁', x₂', x₃' obtained from the axes Px₁, x₂, x₃?

A. They are obtained by a left-handed rotation about the line PQ.
B. They are obtained by a right-handed rotation about the line PQ.
C. They are obtained by a clockwise rotation about the line PQ.
D. They are obtained by a counterclockwise rotation about the line PQ.