%% auteur : gh
100 setxunit
-1 4 setxrange
-2 1 setyrange
/cosa {pi 6 div Cos} def
/sina {pi 6 div Sin} def
/O {0 0} def
/A {cosa sina} def
/B {3 0} def
/Ax {cosa 0} def
/Ay {0 sina} def
/OAA {0 -1.05} def
/OBB {0 -0.95} def
/AA {cosa -1.05} def
/BB {3 -0.95} def
1 setlinewidth
continu
O A (->) line
O B (->) line
<tex>
$$
\vec{u}
$$
</tex>
2.5 0 [1.5 1.5] dctexlabel
<tex>
$$
\vec{u}\,'
$$
</tex>
cosa .8 mul sina .8 mul [1.5 1.5] ultexlabel
bleu
pointilles
A Ax (-) line
2 setlinewidth
continu
O Ax (->) line
<tex>
$$
p(\vec{u}\,')
$$
</tex>
0.5 0 [1.5 1.5] dctexlabel
noir
continu
0.5 setlinewidth
0 -1 2 -1 droite
2 setlinewidth
bleu
OAA AA (->) line
OBB BB (->) line
noir
<tex>
Mesures alg\'ebriques
de $\vec{u}$ et du projet\'e orthogonal de $\vec{u}\,'$
</tex>
1.5 -1.5 [1.5 1.5] cctexlabel
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