i don't know how to do can someone help me to draw this using tikz

enter image description here

  • Hi, welcome. Have you done any research? I would recommend going through the first tutorial (chapter 2) in the TikZ manual (texdoc.net/texmf-dist/doc/generic/pgf/pgfmanual.pdf), that should teach you what need to draw something like that, I think. Feb 6, 2018 at 20:07
  • Please your own Tikz code before asking how to draw something in Tikz. If you haven't tried to do it, then that's not good.
    – A Feldman
    Feb 6, 2018 at 20:07
  • @TorbjørnT. i don't find like this in chapter 2, can just tel me how i can start . Feb 6, 2018 at 20:17
  • No, you won't find how to draw exactly that, but you will find instructions on how to draw a line or an arrow from one point to another, and also instructions on how to add text. And that is all your diagram consists of. Feb 6, 2018 at 20:39

1 Answer 1


Here is a starting point.

\draw[->] (0:0) -- (0:4) node[above] {axe de $s$};
\draw[->] (0:0) -- (45:4) node[right] {axe de $s'$};
\draw[->] (0:0) -- (-20:2) node[right] {$u$};
\draw[->] (0:0) -- (20:2) node[right] {$s(u)$};
\draw[->] (0:0) -- (70:2) node[left] {$s'(s(u))=\rho(u)$};
\draw[-] (-20:2) -- (20:2) -- (70:2);

enter image description here

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