PHP acos() Function Example

Using acos() function we are find the arc cosine value of arg in radians.

PHP acos() Function Example:

Using acos() function we are find the arc cosine value of arg in radians.

    acos(parameter)

The passing parameter require numeric value between -1 to 1. If parameter value is greater or less then the range then it return NAN value.

Example:

<?php
echo (acos(-5)."<br />");
echo(acos(0) . "<br />");
echo(acos(-1) . "<br />");
echo(acos(1) . "<br />");
echo(acos(5));
?> 

Output:

The output of this example is:

NAN
1.5707963267949
3.1415926535898
0
NAN 

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