Hello candidate,

Considering that you are preparing for your Board examinations and hence remembering and recalling the formulas is a very important part while preparing for such exams. Hence the candidate should must get all the formulas and derivations at one proper place so that he can have a pic record to all all of them whenever he needs within a short interval of time.

Several books such as SL Arora, and other sites such as careers 360 can help you get all relevant information at one place and can help boost your preparation.

Hope it helps!!