diff --git a/Exercise sheet 2/exercise_sheet_02.ipynb b/Exercise sheet 2/exercise_sheet_02.ipynb
index 1ea15e1..9754ccd 100644
--- a/Exercise sheet 2/exercise_sheet_02.ipynb	
+++ b/Exercise sheet 2/exercise_sheet_02.ipynb	
@@ -839,7 +839,7 @@
     }
    },
    "source": [
-    "The coordinate transformation $T$ is defined as $T(\\Phi, R) = (R\\cos{\\Phi}, R\\sin{\\Phi}) = (X, Y)$. As $T$ is invertible differentiable, we can write the equality between the joint probability density in both coordinate pairs as\n",
+    "The coordinate transformation $T$ is defined as $T(\\Phi, R) = (R\\cos{\\Phi}, R\\sin{\\Phi}) = (X, Y)$. As $T$ is invertible differentiable, we can write the equality between the joint probability density in both coordinate pairs as follows, using the Jacobian.\n",
     "$$\n",
     "f_{X,Y}(x,y) \\Big|\\frac{\\mathrm{d}x}{\\mathrm{d}\\phi}\\frac{\\mathrm{d}y}{\\mathrm{d}r}-\\frac{\\mathrm{d}y}{\\mathrm{d}\\phi}\\frac{\\mathrm{d}x}{\\mathrm{d}r}\\Big|\n",
     "= f_{X,Y}(T(\\phi,r)) \\Big|\\frac{\\mathrm{d}x}{\\mathrm{d}\\phi}\\frac{\\mathrm{d}y}{\\mathrm{d}r}-\\frac{\\mathrm{d}y}{\\mathrm{d}\\phi}\\frac{\\mathrm{d}x}{\\mathrm{d}r}\\Big|\n",