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\begin{frame}
  \frametitle{Trigonometric Functions}
  
  \vspace{-1ex}
  \begin{center}
    \begin{minipage}{.49\textwidth}\hspace{1.5cm}
      \begin{tikzpicture}[default,scale=1.1]
        \draw (0,0) circle (1cm);
        \draw[fill=clred!20] (0,0) to (30:1cm) arc (30:0:1cm) -- cycle;
        \draw[->] (.4cm,0) arc (0:30:.4cm);
        \node at (15:.65cm) {$\alpha$};
        \draw[dotted] (-1.2,0) -- (1.2,0);
        \draw[dotted] (0,-1.2) -- (0,1.2);
        
        \draw[<->] (0,-.1) -- node[below] {{\tiny radius $1$}} (1,-.1);
         
        \draw[dotted] (30:1cm) -- ({sqrt(3/4)},1.2);
        \draw[cgreen,<->] (0,1.2) -- node[above,inner sep=1mm] {$\cos \alpha$} ({sqrt(3/4)},1.2);
        \draw[dotted] (30:1cm) -- (1.2,1/2);
        \draw[cred,<->] (1.2,0) -- node[right,inner sep=1mm] {$\sin \alpha$} (1.2,1/2);
      \end{tikzpicture}
    \end{minipage}
    \begin{minipage}{.49\textwidth}
      \onslide<2->{
      Properties of $\sin$ and $\cos$:
      \begin{itemize}
        \item domain = \alt<-2>{?}{$(-\infty,\infty)$}
        \item range = \alt<-2>{?}{$[-1,1]$} 
      \end{itemize}
      }\onslide<3>{}
    \end{minipage}
  \end{center}
  \vspace{-1.5ex}
  
  \begin{center}
  {\small $\sin x$}\quad\scalebox{.7}{
  \begin{tikzpicture}[default,baseline=0cm]
    \diagram{-3}{7}{-1.1}{1.3}{1}
    \begin{scope}[ultra thick]
    \draw[cred] plot[smooth,domain=-3:7,samples=300] (\x,{sin(\x*90)});
    \end{scope}
    \diagramannotatez
    \diagramannotatexx{-2/$-\pi$,-1/$-\frac{\pi}{2}$,1/$\frac{\pi}{2}$,2/$\pi$,3/$\frac{3\pi}{2}$,4/$2\pi$,5/$\frac{5\pi}{2}$,6/$3\pi$}
    \diagramannotatey{1,-1}
  \end{tikzpicture}\hspace{1cm}
  }
  \end{center}
  \begin{center}
  {\small $\cos x$}\quad\scalebox{.7}{
  \begin{tikzpicture}[default,baseline=0cm]
    \diagram{-3}{7}{-1.1}{1.3}{1}
    \begin{scope}[ultra thick]
    \draw[cgreen] plot[smooth,domain=-3:7,samples=300] (\x,{cos(\x*90)});
    \end{scope}
    \diagramannotatez
    \diagramannotatexx{-2/$-\pi$,-1/$-\frac{\pi}{2}$,1/$\frac{\pi}{2}$,2/$\pi$,3/$\frac{3\pi}{2}$,4/$2\pi$,5/$\frac{5\pi}{2}$,6/$3\pi$}
    \diagramannotatey{1,-1}
  \end{tikzpicture}\hspace{1cm}
  }
  \end{center}
  \vspace{10cm}
\end{frame}