-2 2.1 setxrange
-1.3 1.8 setyrange
60 setxunit
90 setangle_repere
traceaxes
axesarrow
/O{0 0} def
/cerc{O 1} def
cerc cercle
/X {38.17 cerc cpoint} def
/Y {141.93 cerc cpoint} def
gsave
pointilles
[-1.8 0.618 1.2 0.618] ligne
[-1.8 1 1.2 1] ligne
grestore
$1$
0 1 [1.4 dup] urtexlabel
$u$
2.05 0 [1.4 dup] dltexlabel
$v$
0 1.7 [1.4 dup] crtexlabel
$\arcsin\left({\frac{-1+\sqrt{5}}{2}}\right)$
0.7 0.618 [1.1 dup] urtexlabel
$\pi-\arcsin\left({\frac{-1+\sqrt{5}}{2}}\right)$
-0.3 0.618 [1.1 dup] dltexlabel
[0 0.618] points
${\frac{-1+\sqrt{5}}{2}}$
0 0.618 [1.1 dup] drtexlabel
gsave
4.2 setlinewidth
38.17 141.93 cerc Cercle
grestore
/dotscale {2.0 dup} def
gsave
[X Y 0 1] {point} plot
grestore