JavaScript math acos() method
The JavaScript math acos() method is used to get the arccosine of a number in radians. Syntax: Math.acos(n) Parameters n: It represents the number whose arccosine has to be get. Returns Arccosine of a number. Example: <!DOCTYPE html> <html> <body> <script> document.writeln(Math.acos(1)); </script> </body> </html>