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