25 setxunit 7.5 setborder 90 setangle_repere -2 2 setxrange -4 8 setyrange [1 1 .5 .5 .1 .1] {orange} Quadrillage 1 1 settkstep .5 .5 setsubtkstep 2 2 setmkstep ticks subticks marks traceaxes axesarrow unites /f {setxvar #rpn# cos(x)-(1-x*x/2+x^4/4!) } def /g {setxvar #rpn# 1-x*x/2+x^4/4! } def gsave bleu .75 setlinewidth continu {f} courbe grestore gsave rouge .75 setlinewidth mixte xmin .01 neg {g} Courbe .01 xmax {g} Courbe grestore