Basic Mathematics Class 11 notes include important topics like sets, relations and functions, trigonometry, linear inequalities, and sequences and series. These notes help students understand each concept in a simple way with examples and formulas. They cover definitions, step-by-step solutions, and key points to remember. These notes are useful for quick revision and building a strong foundation for competitive exams too. They are designed to make learning easy and effective for Class 11 students of all boards.