_ _ _ _ _ _ _ _ _ _ _ _ _
It is not that polar co-ordinates are complicated, it is simply that cartesian co-ordinates are simpler than they have a right to be. -Kleppner & Kolenhow, "An Introduction to Mechanics"
_ _ _ _ _ _ _ _ _ _ _ _ _
^__^
(==)\_______
(__)\ )\/\
||----w |
|| ||
tac abc.txt