         <p>
                0.31830988
              </p>
            </td>
<td>
              <p>
                Equivalent to POSIX constant M_1_PI
              </p>
            </td>
</tr>
<tr>
<td>
              <p>
                two_div_pi
              </p>
            </td>
<td>
              <p>
                2/π
              </p>
            </td>
<td>
              <p>
                0.63661977
              </p>
            </td>
<td>
              <p>
                Equivalent to POSI