# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 500, 350 
# set output 'param.7.png'
set dummy t,y
set key bmargin center horizontal Right noreverse enhanced autotitles box linetype -1 linewidth 1.000
set parametric
set samples 160, 160
set trange [ 0.000100000 : 31.4159 ] noreverse nowriteback
set yrange [ -1.50000 : 1.50000 ] noreverse nowriteback
plot sin(t)/t,cos(t)/t