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512 bytes added , 18:33, December 26, 2007

a start

The '''dot product''' is defined for two vectors X and Y to be:

: <math>X \cdot Y = |X||Y|\cos\theta</math>

where |x| is the norm and theta is the angle between the vectors.

It follows from the above definition that the dot product of X and Y is 0 if X is perpendicular to Y.

Alternatively, one can describe the dot product as the length of the geometric interpretation of X onto the unit vector Y when the tails of the two vectors are placed at the same point.
[[category:mathematics]]
[[category:physics]]

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Dot product (view source)

Revision as of 18:33, December 26, 2007