<div class="aide">On note ici les deux paramtres \( \varphi ) et \( \theta ), ils
sont bien sr lis aux coordonnes sphriques: 
<p> <center>\( \left \lbrace \begin{matrix} x&=&\cos(\varphi)\cos(\theta)\\
y&=&\cos(\varphi)\sin(\theta)\\z&=&\sin(\varphi)\end{matrix} \quad (\theta,\varphi)\in D
)</center></p>
avec \( D=\lbrace (\theta,\varphi), 0\leq \theta <2\pi, -\pi/2\leq \varphi\leq
\pi/2\rbrace ).
</div>

\def{text L=randint(1..4),randint(1..4),randint(1..4),-randint(1..4),randint(1..4),random(+,-)randint(1..4)}
\def{text data=cos(u)*cos(v), sin(u)*cos(v),sin(v),0,2*pi,-pi/2,pi/2}
\def{text data1=\data[1]}
\def{text data2=\data[2]}
\def{text data3=\data[3]}
\def{text data4=\data[4]}
\def{text data5=\data[5]}
\def{text data6=\data[6]}
\def{text data7=\data[7]}
\def{text data8=\data[8]}
\def{text data9=\data[9]}
\def{text data10=\data[10]}
\def{text data11=\data[11]}
\def{text data12=\data[12]}
\def{text data13=\data[13]}

<div class="exercice">
\tool{module=tool/geometry/animtrace.fr&+cmd=new&+type=parametric3DS&+special_parm=noshow&+quality=4&+x1=\data1&+y1=\data2&+z1=\data3&+uleft=\data4&+uright=\data5&+vleft=\data6&vright=\data7&
+xleft=\data8&+xright=\data9&+yleft=\data10&+yright=\data11&+zleft=\data12&+zright=\data13}{
Trac}
</div>