VECTOR ALGEBRA | INTRODUCTION, EVOLUTION OF VECTOR CONCEPT, TYPES OF VECTORS | Two type of numbers - Vector and scalar., Evolution of vector concept, Representation of vector direction sense magnitude of vector or length, Equal vectors, null vector, unit vectors, position vector, like and unlike vectors,collinear and parallel vectors, Co-initial vectors, coterminous vector and co-planar vectors,negative of a vector,reciprocal vectors, Free vector and localized vector, In a regular hexagon find which vectors are collinear, equal, coinitial, collinear but not equal.