Even without Deepthi Publications, you can score well by following this study plan:
Borrow physical copies from local libraries, universities, or community centers. Many libraries now digitize textbooks for in-house use. Deepthi Publications Maths 1b Pdf Free Download
Most junior colleges maintain a library that stocks reference books like Deepthi Publications. Students can borrow the book for study hours or for copying down important questions without needing to purchase it. Even without Deepthi Publications, you can score well