Step 1: We need a external library of angular js that we can get from cdn source and store that whole code in ui script of servicenow
Link to get the library code: https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.11/angular.min.js
Step 2: In UI page I can use angular js now by using <g:requires> tag
Step 3: click on try it button you will be able to see
