You are not supposed to put anything between the jquery tags.
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
</head>
Then create another script inside the body of your application. Here is an example from w3schools:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("p").hide();
});
});
</script>
</head>
<body>
<h2>This is a heading</h2>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
<button>Click me</button>
</body>
</html>
The example above shows how to hide an element using jQuery with a click of a button.
However, I am not sure it is the best way to hide an element in Angular. You can do it with an example from here:
Angular 2 Show and Hide an element
Please look at gentiane answer.