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# 5.4: Dot Products

Difficulty Level: At Grade Created by: CK-12
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### Vocabulary Language: English

dot product

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

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

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.

At Grade

Nov 01, 2012

## Last Modified:

Jun 08, 2015
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