Some members of USMA make war on customary units with consumer goods but remain
averse to the SI unit for plane angle, the radian. Perhaps a clever product
like this clock
<http://www.cafepress.com/+unit_circle_radian_wall_clock,49111330> will make
the radian seem fun, if not easy. You can find many such designs by googling
“unit circle radian wall clock.” The clutter of expressions around the dial
results from our clumsy need to represent the radian in familiar terms, I
think. A true radian clock would be calibrated with zero and six notches for
increments of 1 to 6.
