init

tikzgrafiken/tikz_4_2_1.tex

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+\documentclass{article}
+\usepackage{tikz}
+\usetikzlibrary{arrows}
+\usetikzlibrary{snakes}
+\usepackage{verbatim}
+
+\tikzstyle{mybox} = [draw=red, fill=blue!20, very thick,
+    rectangle, rounded corners, inner sep=10pt, inner ysep=20pt]
+
+\begin{document}
+
+\begin{tikzpicture}[scale=1.5]
+%\begin{tikzpicture}[scale=3]
+
+    %\draw[step=0.1, color=lightgray] (-1,-1) grid(4.5,4.5);
+
+    \draw[help lines] (0,0) grid (7,3);
+    \draw[-triangle 45] (0,0) -- (4,0) node[midway,sloped,above] {$\vec a$};
+    \draw[-triangle 45] (0,0) -- (2,2) node[midway,sloped,above] {$\vec b$};
+
+    \draw[style=dashed]  (2,2) -- (6,2);
+    \draw[style=dashed]  (4,0) -- (6,2);
+    
+    
+    \draw (0,0) +(0:1cm) arc (0:45:1cm);
+
+    \path (0,0) ++(22.5:.75cm) node{$\alpha$};
+
+\end{tikzpicture}
+\end{document}