>	# A Polar Coordinates Graph for Valentine's Day # Submitted by Dwight Boddorf to  the MAA's # American Mathematical Monthly # Volume 115 Number 2 (February 2008) page 113 plot([abs(tan(t))^(1/abs(tan(t)))*cos(t), abs(tan(t))^(1/abs(tan(t)))*sin(t), t=0..Pi], axes=none);