.
Divya
The php acosh() function returns the inverse hyperbolic cosine of a number and its always a float type.
inverse hyperbolic cosine means cosh^(-1)z;
<!DOCTYPE html>
<html>
<body>
<?php
echo(acosh(5) . "<br>");
echo(acosh(55) . "<br>");
echo(acosh(5.55));
?>
output:
2.2924316695612
4.7003977109172
2.3987282533249
</body>
</html>
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