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<!DOCTYPE html>
<html>
<body>
<?php
echo(sinh(3) . "<br>");
echo(sinh(-3) . "<br>");
echo(sinh(0) . "<br>");
echo(sinh(M_PI) . "<br>");
echo(sinh(M_PI_2));
?>
</body>
</html>
10.01787492741
-10.01787492741
0
11.548739357258
2.3012989023073