Présentation de 1859.jps

25 setxunit 7.5 setborder 90 setangle_repere -10 10 setxrange -4 8 setyrange [1 1 .5 .5 .1 .1] {orange} Quadrillage /quadrillagegray 0.4 def 1 setquadrillagexstep 1 setquadrillageystep quadrillage 1 1 settkstep .5 .5 setsubtkstep 2 2 setmkstep ticks subticks marks traceaxes axesarrow unites /f {setxvar #rpn# acos(Ch(x)+2*Sh(x)) } def gsave bleu .75 setlinewidth continu {f} courbe grestore