Scalar Product

• The scalar product is one type of multiplication of two vectors, defined as a•b=ab cosq, (8)

where q is the angle between the vectors a and b. The result is a scalar. Since it has a dot in it, it’s also called a dot product. Look at the cosq, if b is along the x-axis, a cosq gives the x component of a. In fact, the scalar product is the prod

• The scalar product satisfies the following

a•b=b•a, (a+b)•c=a•c+b•c (9)

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