Question

define the dot and cross product of two vectors

Answer 1

A.B=ABCos theta
A*B=ABSin theta

Answer 2

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=> Algebraically, the dot product is the sum of the products of the corresponding entries of the two sequences of numbers. ... Geometrically, it is the product of the Euclidean magnitudes of the two vectors and the cosine of the angle between them. These definitions are equivalent when using Cartesian coordinates.