This gives you a complete set of formulas for Sets, Relations and Functions needed for Class 12 maths. You will start with the definition of a set , properties of union and intersection of 2 sets. Number of elements in A union B , number of elements in A union B union C .Concept of a Relation, Types of Relations, Reflexive, Symmetric, Transitive, Equivalence Relation and Equivalence Classes. Functions, Injective and Surjective and other types. Composite functions and Binary Operations.