The SQRT1_2 property of the Math object represents the square root of 1/2.
Syntax
Its Syntax is as follows
Math.SQRT1_2
Example
<html> <head> <title>JavaScript Example</title> </head> <body> <script type="text/javascript"> var result = Math.SQRT1_2; document.write(result); </script> </body> </html>
Output
0.7071067811865476