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39 lines
1.2 KiB
TeX
39 lines
1.2 KiB
TeX
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\documentclass{article}
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\usepackage[pdftex,active,tightpage]{preview}
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\setlength\PreviewBorder{0mm}
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\usepackage{pgfplots}
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\pgfplotsset{compat=1.9}
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\begin{document}
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\begin{preview}
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\begin{tikzpicture}
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\begin{axis}[
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axis x line=middle,
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axis y line=middle,
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enlarge y limits=true,
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enlarge x limits=true,
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xmin=0, xmax=pi, % x domain
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width=12cm, height=8cm, % size of the image
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grid = major,
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grid style={dashed, gray!30},
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ymin=-1, % start the diagram at this y-coordinate
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ymax= 1, % end the diagram at this y-coordinate
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% axis background/.style={fill=white},
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ylabel=$y$,
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xlabel=$x$,
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xtick={0,1.5708,3.14159},
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xticklabels={$0$,$\frac{\pi}{2}$,$\pi$},
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legend style={at={(0.2,0.37)}, anchor=north, fill=none}
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]
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\addplot[domain=-8:8,very thick,samples=200,blue] {cos(deg(x))};
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\addplot[domain=-8:8,very thick,samples=200,red] {x};
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\coordinate (a) at (axis cs:0.739085,0.739085);
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\fill[red] (a) circle (3pt);
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\node[label={[label distance=0.1cm]0:$x = y \approx 0.739085$}] at (a) {};
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\legend{$\cos x$, $x$}
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\end{axis}
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\end{tikzpicture}
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\end{preview}
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\end{document}
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