\documentclass[12pt]{article}
\usepackage{a4wide}
\usepackage[utf8]{inputenc}
\usepackage[czech]{babel}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{pgf,tikz}
\usetikzlibrary{arrows}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\begin{document}
\noindent Obrázek bílé myšky:
\begin{center}
\includegraphics[width=0.5\textwidth]{mys.pdf}
\end{center}
Graf funkce pro $ \sin{x} $ pro $ x \in [-\pi,\pi]$:
\begin{center}
\begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1.0cm,y=1.0cm]
\draw[->,color=black] (-3.5,0.) -- (3.5,0.);
\foreach \x in {-3,-2,-1,1,2,3}
\draw[shift={(\x,0)},color=black] (0pt,2pt) -- (0pt,-2pt) node[below] {\footnotesize $\x$};
\draw[->,color=black] (0.,-2.5) -- (0.,2.5);
\foreach \y in {-2,-1,1,2}
\draw[shift={(0,\y)},color=black] (2pt,0pt) -- (-2pt,0pt) node[left] {\footnotesize $\y$};
\draw[color=black] (0pt,-10pt) node[right] {\footnotesize $0$};
\clip(-3.5,-2.5) rectangle (3.5,2.5);
\draw[smooth,samples=100,domain=-3.141592653589793:3.141592653589793] plot(\x,{sin(((\x))*180/pi)});
\draw (0.786849246731,1.7718447198) node[anchor=north west] {$f(x)=\sin(x)$};
\end{tikzpicture}
\end{center}
Matematicky nadané prasátko:
\begin{center}
\begin{tikzpicture}
\draw  (-3,2.5) node (v1) {} rectangle (3.5,-2) node (v3) {};
\draw (v1) -- (-5.5,0.5) -- (-3,-2) node (v2) {};
\draw  plot[smooth, tension=.7] coordinates {(3.5,0.5) (6,1) (5.5,2) (5,1.5) (5.5,0.5) (7,0.5) (7.5,1.5)};
\draw (v2) -- (-4,-3.5);
\draw (v2) -- (-2,-3.5);
\draw (v3) -- (2.5,-3.5);
\draw (v3) -- (4.5,-3.5);
\draw  plot[smooth, tension=.7] coordinates {(-4,1.5) (-4,1) (-3.5,1) (-3.5,1.5) (-4,1.5)};
\node at (0,0) {\large $\sqrt{x^2+y^2}$};
\end{tikzpicture}
\end{center}
\newpage
\noindent \includegraphics[width=2cm]{mu.pdf}
\hrulefill
\includegraphics[width=2cm]{logosci.pdf}
\vfill
\noindent Šířka boxu je jeden 2\,cm.
\begin{center}
\begin{minipage}[t]{.25\linewidth}
\vspace{0pt}
\centering
\includegraphics[width=2cm]{box}
\end{minipage}%
\begin{minipage}[t]{.25\linewidth}
\vspace{0pt}
\centering
\includegraphics[width=2cm,angle=-35]{box}
\par\vspace{0pt}
\end{minipage}
\end{center}
\vfill
Šířka boxu je jeden inch.
\begin{center}
\begin{minipage}[t]{.25\linewidth}
\vspace{0pt}
\centering
\includegraphics[width=1in]{box}
\end{minipage}%
\begin{minipage}[t]{.25\linewidth}
\vspace{0pt}
\centering
\includegraphics[width=1in,angle=-90]{box}
\par\vspace{0pt}
\end{minipage}
\end{center}
\end{document}