Translations:Sinusoidal motion/14/es

${\begin{aligned}{\rm {vector}}\ ({\rm {at}}\ {\rm {time}}\ n\Delta t)\ {\rm {=\ cos\ }}\omega n\Delta t{\ +\ }i{\rm {\ sin\ }}\omega n\Delta t{\ =\ }e^{i\omega n\Delta t}\end{aligned}}$

(9)