Wrapfigure no produce figura

Question

mi codigo es

\documentclass{book}
\usepackage{wrapfigure}
\newtheorem{problem}{P}[chapter]
\begin{document}
A circle is drawn in a sector of a larger circle
\begin{problem}
\begin{wrapfigure}{r}{0.5\textwidth}
\centering
\includegraphics[width=0.38\textwidth]{TrigFig23.pdf}
\end{wrapfigure}
\noindent
of radius $r$, as shown in the adjacent figure. 
The smaller circle is tangent to the two bounding radii and the arc of the sector. Find the radius of the smaller circle.
\end{problem}
\end{document}

Este código no produce ninguna cifra (tampoco muestra error). wrapfigTambién he usado el paquete. ¡¡Por favor ayuda!!

Answer 1

Con dos minipáginas en lugar de wrapfig:

\documentclass{book}
\usepackage{graphicx}
\usepackage[export]{adjustbox}
\newtheorem{problem}{P}[chapter]
\begin{document}

\begin{problem}
\begin{minipage}[t]{0.5\textwidth}
A circle is drawn in a sector of a larger circle of radius $r$, as shown in the adjacent figure. 
The smaller circle is tangent to the two bounding radii and the arc of the sector. Find the radius of the smaller circle.
\end{minipage}%
\begin{minipage}[t]{0.5\textwidth}
\centering
\includegraphics[width=0.38\textwidth,valign=t]{example-image}
\end{minipage}
\end{problem}
\end{document}

Answer 2

Propongo esta variante de diseño, con el insboxconjunto de paquetes de macros TeX simples:

\documentclass{book}
\usepackage{graphicx}
\input{insbox}
\newtheorem{problem}{P}[chapter]

\begin{document}

\begin{problem}\leavevmode%
\InsertBoxR{-1}{\includegraphics[width=0.38\textwidth]{example-image}}\par\noindent
A circle is drawn in a sector of a larger circle of radius $r$, as shown in the adjacent figure.
The smaller circle is tangent to the two bounding radii and the arc of the sector. Find the radius of the smaller circle.
\end{problem}

\end{document}

Answer 3

Dado que el "problema" es un entorno conflictivo que impide la colocación de figuras allí, y la "figura envolvente" se coloca al principio de los párrafos, puede proporcionar un párrafo falso con~~\vspace*{-\baselineskip}

\documentclass{book}
\usepackage{wrapfig}
\usepackage{graphicx}
\newtheorem{problem}{P}[chapter]
\begin{document}
A circle is drawn in a sector of a larger circle

\begin{wrapfigure}{r}{0.5\textwidth}
\centering
\includegraphics[width=0.38\textwidth]{example-image-a.pdf}
\end{wrapfigure}
~~\vspace*{-\baselineskip}
\begin{problem}
\noindent
of radius $r$, as shown in the adjacent figure. 
The smaller circle is tangent to the two bounding radii and the 
arc of the sector. Find the radius of the smaller circle.
\end{problem}
\end{document}