<font face="courier new, courier, mono" color="#0000ff" size="3"> <hr> <br><br><title>常用数学函数(一)</title> <br><br><br><br> print(abs(-13));//打印绝对值<br>?><br><br> // 从 -1 到1打印acos函数的值<br> print("<table border='\"1\"'>\n");<br> print("<tr> <th>x</th> <th>acos(x)</th> </tr>\n");<br> for($index = -1; $index {<br> print("<tr>\n");<br> print("<td>$index</td>\n");<br> print("<td>" . acos($index) . "</td>\n");<br> print("</tr>\n");<br> }<br> print("</table>\n");<br>?><br><br> // 从 -1 到 1打印asin函数的值<br> print("<table border='\"1\"'>\n");<br> print("<tr> <th>x</th> <th>asin(x)</th> </tr>\n");<br> for($index = -1; $index {<br> print("<tr>\n");<br> print("<td>$index</td>\n");<br> print("<td>" . asin($index) . "</td>\n");<br> print("</tr>\n");<br> }<br> print("</table>\n");<br>?><br><br> <hr> </font><br><img alt="常用数学函数" hspace="0" src="http://img.bitscn.com/upimg/php/20070123/11E54b400P24154.jpg" align="baseline" border="0">