\section{ACOSD Inverse Cosine Degrees Function}

\subsection{Usage}

Computes the inverse cosine of the argument, but returns
the argument in degrees instead of radians (as is the case
for \verb|acos|. The syntax for its use is
\begin{verbatim}
   y = acosd(x)
\end{verbatim}
\subsection{Examples}

The inverse cosine of \verb|sqrt(2)/2| should be 45 degrees:
\begin{verbatim}
--> acosd(sqrt(2)/2)
ans = 
  <double>  - size: [1 1]
 45  

\end{verbatim}
and the inverse cosine of \verb|0.5| should be 60 degrees:
\begin{verbatim}
--> acosd(0.5)
ans = 
  <double>  - size: [1 1]
 60.00000000000001  

\end{verbatim}
