Hello hello !!

I am hoping that you are absolutely fine. As per your mentioned query , I would like to tell you that at most of the times Ncert cover all the formulas of jee mains. In chemistry , ncert plays a major role. You can find 90% stuff of jee mains from ncert only. But in case of maths and physics, you will read the formula which have short tricks in them that are not in ncert but you have to study for the preparation of jee mains. And in physics , as there are so many concept in ncert and based on those concepts other references books makes the short tricks.

So , we can say that ncert covers most of the formula but you have to read conceptually.

I hope this will be helpful for you.

Good luck !!