diff --git a/theorie-signal/exercices/plot_sx1.py b/theorie-signal/exercices/plot_sx1.py
new file mode 100755
index 0000000..503eca6
--- /dev/null
+++ b/theorie-signal/exercices/plot_sx1.py
@@ -0,0 +1,8 @@
+#!/usr/bin/env python3
+
+import math
+
+for x in range(-8, 9):
+    if x % 2 != 0:
+        f = 4/((math.pi ** 2) * (x**2))
+        print(f)
diff --git a/theorie-signal/exercices/plot_sx2.py b/theorie-signal/exercices/plot_sx2.py
new file mode 100755
index 0000000..9f9e5eb
--- /dev/null
+++ b/theorie-signal/exercices/plot_sx2.py
@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+
+import math
+
+for n in range(-8, 9):
+    r = 1/2
+    if n != 0:
+        f = (math.fabs(math.sin(n*math.pi*r)/n*math.pi))**2
+        print(f)
diff --git a/theorie-signal/exercices/tp1.tex b/theorie-signal/exercices/tp1.tex
index 9c49739..a584eba 100644
--- a/theorie-signal/exercices/tp1.tex
+++ b/theorie-signal/exercices/tp1.tex
@@ -107,9 +107,6 @@ Théorie du signal --- TP1
                &= r + \sum_{n=0}^{+\infty} \frac{2\sin(n\pi r)}{n\pi} \cos(n\omega_0 t)
     \end{align*}
 
-    \begin{tikzpicture}
-    \end{tikzpicture}
-
 \subsection{Densité Spectrale de Puissance}
 
     \subsubsection{Pour $x_1$}
@@ -132,6 +129,22 @@ Théorie du signal --- TP1
                    \right.
         \end{align*}
 
+        \begin{center}
+        \begin{tikzpicture}
+            \draw[help lines, dashed] (-6,-1) grid (6,3);
+            \draw[-latex] (-6,0) -- (6,0) node[below]{$f$};
+            \draw[-latex] (0,-1) -- (0,3) node[left]{$S_x(f)$};
+            % j'ajoute 2 pour la visibilité
+            \draw[-latex,very thick, teal] (-5, 0) -- (-5, 2+0.016211389382774045);
+            \draw[-latex,very thick, teal] (-3, 0) -- (-3, 2+0.04503163717437234);
+            \draw[-latex,very thick, teal] (-1, 0) -- (-1, 2+0.4052847345693511);
+            \draw[-latex,very thick, teal] (0, 0) -- (0, 2+0.5);
+            \draw[-latex,very thick, teal] (1, 0) -- (1, 2+0.4052847345693511);
+            \draw[-latex,very thick, teal] (3, 0) -- (3, 2+0.04503163717437234);
+            \draw[-latex,very thick, teal] (5, 0) -- (5, 2+0.016211389382774045);
+        \end{tikzpicture}
+        \end{center}
+
     \subsubsection{Pour $x_2$}
         \begin{equation*}
             c_0 = a_0 = r
@@ -150,4 +163,26 @@ Théorie du signal --- TP1
             \text{pour } r=\frac{1}{4} &\implies
             \sum_{n=-\infty}^{+\infty} \left|\frac{\sin(\frac{n\pi}{4})}{n\pi}\right|^2 \\
         \end{align*}
+
+        \begin{center}
+        \begin{tikzpicture}
+            \draw[help lines, dashed] (-6,-1) grid (6,3);
+            \draw[-latex] (-6,0) -- (6,0) node[below]{$f$};
+            \draw[-latex] (0,-1) -- (0,3) node[left]{$S_x(f)$};
+
+            \draw[-latex,very thick, teal] (-6, 0) -- (-6, 3.700508937884072e-32);
+            \draw[-latex,very thick, teal] (-5, 0) -- (-5, 0.3947841760435743);
+            \draw[-latex,very thick, teal] (-4, 0) -- (-4, 3.700508937884072e-32);
+            \draw[-latex,very thick, teal] (-3, 0) -- (-3, 1.0966227112321507);
+            \draw[-latex,very thick, teal] (-2, 0) -- (-2, 3.700508937884072e-32);
+            \draw[-latex,very thick, teal] (-1, 0) -- (-1, 9.869604401089358);
+            \draw[-latex,very thick, teal] (0, 0) -- (0, 0.5);
+            \draw[-latex,very thick, teal] (1, 0) -- (1, 9.869604401089358);
+            \draw[-latex,very thick, teal] (2, 0) -- (2, 3.700508937884072e-32);
+            \draw[-latex,very thick, teal] (3, 0) -- (3, 1.0966227112321507);
+            \draw[-latex,very thick, teal] (4, 0) -- (4, 3.700508937884072e-32);
+            \draw[-latex,very thick, teal] (5, 0) -- (5, 0.3947841760435743);
+            \draw[-latex,very thick, teal] (6, 0) -- (6, 3.700508937884072e-32);
+        \end{tikzpicture}
+        \end{center}
 \end{document}