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\begin{frame}
  \frametitle{Inverse Trigonometric: Cancellation Equations}
  
  The cancellation equations are:
  \begin{block}{}
    \begin{talign}
      \arcsin(\sin x) &= x \quad \text{for $-\frac{\pi}{2} \le x \le \frac{\pi}{2}$} \\
      \sin(\arcsin x) &= x \quad \text{for $-1 \le x \le 1$} 
    \end{talign}
  \end{block}
  \pause\medskip
  
  \begin{block}{}
    \begin{talign}
      \arccos(\cos x) &= x \quad \text{for $0 \le x \le \pi$} \\
      \cos(\arccos x) &= x \quad \text{for $-1 \le x \le 1$} 
    \end{talign}
  \end{block}
\end{frame}