Yes, all the chapter-wise sheet of formulas is prepared in such a way that it consists of all-important formulas asked in board school or competitive entrance exam like Olympiad , CBSE, NTSE, JEE and JEE advance. Students are recommended to check out your text book try to prepare your own notes of derivation and application of formulas build your conceptual clarity on the chapter try to resolve the examples which give you more clarity on the concepts. Maths formulas sheet must be use for reference not to be mugged up.