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acos

Reverse cosine
Name:acos
Category:math
Programming Language:php
One-line Description:Reverse cosine.

Definition and usage

acos() function returns the inverse cosine of a number.

Example

In this case, we will calculate the inverse cosine of different values:

 <?php
echo ( acos ( 0.64 ) ) ;
echo ( acos ( 0 ) ) ;
echo ( acos ( - 1 ) ) ;
echo ( acos ( 1 ) ) ;
echo ( acos ( 2 ) ) ;
?>

Try it yourself

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