Limit (সীমা) | Lecture 06 | MCQ 57 to 70 solution | SN Dey | Class 11 maths

Welcome to Independent math! In Lecture 06 of our Class 11 Maths series, we dive deep into the Limit (সীমা) chapter. This video provides detailed, step-by-step solutions for MCQs 57 to 70 from the renowned SN Dey mathematics textbook. Whether you are preparing for your West Bengal Board (WBCHSE) exams, WBJEE, or JEE Main, this lecture breaks down complex algebraic and trigonometric limit problems in easy-to-understand Bengali. We also cover crucial calculus concepts including the application of L'Hôpital's rule, evaluating Left-Hand Limits (LHL) and Right-Hand Limits (RHL), and solving advanced problems involving modulus and greatest integer functions (box x). 📌 Key Concepts Covered: Trigonometric limit proofs and transformations Application of cos(C) - cos(D) and sin(A+B) identities Conceptual breakdown of √(x²) = |x| and why limits sometimes do not exist Solving limits with Greatest Integer Functions (Box x) ⏱️ Video Chapters: 00:00 - Introduction & Recap of Previous Classes 01:06 - MCQ 57: Limit involving sec(x) & Derivative Concepts 10:04 - MCQ 58: Solving Limits with Trigonometric Conversions 20:09 - Advanced Problems: Applying cos(C) - cos(D) Formulas 36:37 - MCQ 68: Deep Dive into √(x²) = |x|, LHL vs RHL 43:36 - MCQ 70: Limits with Greatest Integer Function (Box x) & Modulus 47:52 - Wrap-up & Next Lecture Preview 💡 Highly Recommended For: Class 11 Students (WBCHSE / West Bengal Board) WBJEE Aspirants JEE Main Candidates Don't forget to Like, Share, and Subscribe to Independent math for more complete mathematical solutions! If you have any doubts about a specific problem, let me know in the comments below. #Limit #SNDeySolution #Class11Maths #WBCHSE #WBJEE #JEEMain #IndependentMath #Calculus #Mathematics #BengaliMaths