How to redirect to another page using AngularJS?

You can use Angular $window:

$window.location.href = '/index.html';

Example usage in a contoller:

(function () {
    'use strict';

    angular
        .module('app')
        .controller('LoginCtrl', LoginCtrl);

    LoginCtrl.$inject = ['$window', 'loginSrv', 'notify'];

    function LoginCtrl($window, loginSrv, notify) {
        /* jshint validthis:true */
        var vm = this;
        vm.validateUser = function () {
             loginSrv.validateLogin(vm.username, vm.password).then(function (data) {          
                if (data.isValidUser) {    
                    $window.location.href = '/index.html';
                }
                else
                    alert('Login incorrect');
            });
        }
    }
})();