%0 Journal Article %A N. J. Wildberger %T Rotor Coordinates and Vector Trigonometry %J Journal for geometry and graphics %D 2017 %P 89-106 %V 21 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/JGG_2017_21_1_JGG_2017_21_1_a8/ %F JGG_2017_21_1_JGG_2017_21_1_a8