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The PHP cosh() function is used to return hyperbolic cosine of a value. The hyperbolic cosine of x is defined as:

cosh

where e is an Euler's number.

Syntax

cosh(number)

Parameters

number Required. Specify the value.

Return Value

Returns the hyperbolic cosine of a value.

Example:

In the below example, cosh() function is used to find out the hyperbolic cosine of a value.

<?php
  echo cosh(0)."\n";
  echo cosh(2)."\n";
  echo cosh(4)."\n";
?>

The output of the above code will be:

1
3.7621956910836
27.308232836016

❮ PHP Math Functions