Wrapfigure não está produzindo figura

Question

Meu código é

\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 não está produzindo nenhuma figura (nem está mostrando erro). Eu usei wrapfigo pacote também. Por favor ajude!!

Answer 1

Com duas minipáginas em vez 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

Proponho este layout variante, com o insboxconjunto de pacotes simples de macros TeX:

\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

Como o "problema" é um ambiente conflitante que impede a colocação de figuras ali, e a "figura envolvente" é colocada no início dos parágrafos, você pode fornecer um parágrafo falso com~~\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}