tr><td>acos</td><td>Inverse cosine.  Elements must be in the range [-1,+1].  The resulting elements lie in [-Pi,+Pi].</td>     <td>Y</td>     <td>Y</td>  <td>all</td><td>     </td></tr>
<tr><td>acosh</td><td>Inverse hyperbolic cosine</td> <td>Y</td>     <td></td>  <td>all</td><td>     </td></tr>

<tr><td>arg</td>
<td>Argument (phase/angle) of a complex vector. Result is a scalar vector whose elements lie in [-Pi, +Pi].</td>
<td></td>
<td>Y</td>
<td>all<sup>b</sup></td></tr>

<tr><td>asin</td><td>Inverse sin