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5.4: Dot Products

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

TermDefinition
dot product The dot product is also known as inner product or scalar product. The two forms of the dot product are \vec{a} \cdot \vec{b} = \Big \| \vec{a}\Big \| \ \Big \| \vec{b}\Big \| \cos \theta and \vec{a} \cdot \vec{b} = x_a x_b + y_a y_b.
scalar product A scalar product is the same as a dot product. The scalar product produces a number that can be interpreted to tell how much one vector goes in the direction of the other vector.
scalar projection The scalar projection of a vector onto another vector is equal to the length of the projection of the first vector onto the second vector.

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Difficulty Level:
At Grade
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Date Created:
Nov 01, 2012
Last Modified:
Mar 23, 2016
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MAT.ALY.532.L.1