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What is cross vector? In this video, Dr. Walter Lewin presents the concept of cross product of two vectors. The cross product, also known as the vector product, is a binary operation on two vectors in three-dimensional space. It results in a vector that is perpendicular to both of the original vectors and is denoted by the symbol ×. The cross product is defined only in three-dimensional space and has many applications in mathematics, physics, engineering, and computer programming. In mathematics