-1.5 2.5 setxrange
-3.5 2.5 setyrange
50 setxunit
50 setyunit
90 setangle_repere

traceaxes
axesarrow
 
/O{0 0} def
/cerc{O 1} def
cerc cercle

/X {63.43 cerc cpoint} def
/Y {-71.56 cerc cpoint} def
/A {O X 1.2 0 1.2 2 interdroite} def
/B {O Y 1.2 0 1.2 2 interdroite} def
/C {O X 1 0 1 2 interdroite} def
/D {O Y 1 0 1 2 interdroite} def
[C D] points
[O A] ligne
[O B] ligne
gsave
pointilles
[1 -3.5 1 2.5] ligne
grestore

<latex>
$u$
</latex>
2.5 0 [1.4 dup] dltexlabel

<latex>
$v$
</latex>
0 2.4 [1.4 dup] crtexlabel

<latex>
$\arctan(2)$
</latex>
0.5 0.75 [1.1 dup] urtexlabel

<latex>
$\arctan(-3)$
</latex>
0.4 -0.8 [1.1 dup] drtexlabel

<latex>
$-3$
</latex>
1 -3 [1.1 dup] crtexlabel

<latex>
$2$
</latex>
1 2 [1.1 dup] crtexlabel
gsave
4.2 setlinewidth
-71.56 63.43 cerc Cercle
grestore

/dotscale {2.0 dup} def
gsave
[X Y] {point} plot
grestore