Cfrgtkky

In last semester, I started using LaTeX just for assignments and homework but now I wanted to take to the next level.

I started with the tikz library following the pgfmanual. Everytime I try to compile my code I get different result from the documentation, or it won't even compile.

For example this first code I copied it right from the documentation

    documentclass{standalone}

usepackage{tikz}



begin{document}



begin{tikzpicture}[>=stealth, scale=3] 



    clip (-2, -0.2) rectangle (2,0.8);

    draw[step=.5cm,gray,very thin] (-1.4,-1.4) grid (1.4,1.4);

    draw[<->](-1.5, 0) -- (1.5,0);

    draw[<->](0, -1.5) -- (0, 1.5);

    draw (0,0) circle [radius=1cm];



    draw[very thick,red]

        (30:1cm) -- node[left=1pt,fill=white] {$sin alpha$} (30:1cm |- x axis);

    draw[very thick blue]

        (30:1cm |- x axis) -- node[below=2pt,fill=white] {$cos alpha$} (0,0);



    filldraw[fill=green!20!white, draw=green!50!black] (0,0) -- (3mm,0mm)

        arc [start angle=0, end angle=30, radius=3mm] --cycle;

    foreach xxtext in {-1,-0.5/-frac{1}{2}, 1}

        draw (x cm, 1pt) -- (x cm, -1pt) node [anchor=north] {$xtext$};

    foreach y/ytext in {-1,-0.5/-frac{1}{2}, 0.5/frac{1}{2}, 1}

        draw (1pt, y cm) -- (-1pt, y cm) node [anchor=east] {$ytext$};





    path [name path=upward line] (1,0) -- (1,1);

    path [name path=sloped line] (0,0) -- (30:1.5cm);

    draw [name intersections={of=upward line and sloped line, by=t}]

            [very thick, orange]  (1,0) -- node [right=1pt,fill=white];

            {$displaystyle tan alpha color{black} =

                frac{{color{red}sin alpha}}{color{blue} cos alpha}$} (t);





end{tikzpicture}





end{document}

This is the result when I compile it:

This is the result shown in the documentation:

OS: Ubuntu 18.04 LTS
I have installed Texlive iso on it.

You can't just copy and paste code examples from the manual. You actually have to read the manual to find out how to use the examples. In this case you are missing usetikzlibrary{intersections}.

Here is the relevant part from the tutorial:

documentclass{standalone}

usepackage{tikz}

usetikzlibrary{intersections}

begin{document}

begin{tikzpicture}[scale=3]

  clip (-2,-0.2) rectangle (2,0.8);

  draw[step=.5cm,gray,very thin] (-1.4,-1.4) grid (1.4,1.4);

  filldraw[fill=green!20,draw=green!50!black] (0,0) -- (3mm,0mm)

    arc [start angle=0, end angle=30, radius=3mm] -- cycle;

  draw[->] (-1.5,0) -- (1.5,0) coordinate (x axis);

  draw[->] (0,-1.5) -- (0,1.5) coordinate (y axis);

  draw (0,0) circle [radius=1cm];



  draw[very thick,red]

    (30:1cm) -- node[left=1pt,fill=white] {$sin alpha$} (30:1cm |- x axis);

  draw[very thick,blue]

    (30:1cm |- x axis) -- node[below=2pt,fill=white] {$cos alpha$} (0,0);

  path [name path=upward line] (1,0) -- (1,1);

  path [name path=sloped line] (0,0) -- (30:1.5cm);

  draw [name intersections={of=upward line and sloped line, by=t}]

    [very thick,orange] (1,0) -- node [right=1pt,fill=white]

    {$displaystyle tan alpha color{black}=

      frac{{color{red}sin alpha}}{color{blue}cos alpha}$} (t);



  draw (0,0) -- (t);



  foreach x/xtext in {-1, -0.5/-frac{1}{2}, 1}

    draw (x cm,1pt) -- (x cm,-1pt) node[anchor=north,fill=white] {$xtext$};

  foreach y/ytext in {-1, -0.5/-frac{1}{2}, 0.5/frac{1}{2}, 1}

    draw (1pt,y cm) -- (-1pt,y cm) node[anchor=east,fill=white] {$ytext$};

end{tikzpicture}

end{document}