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Find $ a \cdot b $.
$ a = \langle 6, -2, 3 \rangle $ , $ b = \langle 2, 5, -1 \rangle $
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$a \cdot b=-1$
Vectors and the Geometry of Space
The Dot Product
Johns Hopkins University
In mathematics, a vector (from the Latin word "vehere" meaning "to carry") is a geometric entity that has magnitude (or length) and direction. Vectors can be added to other vectors according to vector algebra. Vectors play an important role in physics, engineering, and mathematics.
In mathematics, a vector (from the Latin word "vehere" which means "to carry") is a geometric object that has a magnitude (or length) and direction. A vector can be thought of as an arrow in Euclidean space, drawn from the origin of the space to a point, and denoted by a letter. The magnitude of the vector is the distance from the origin to the point, and the direction is the angle between the direction of the vector and the axis, measured counterclockwise.
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Okay, So to find the dot product here, we just multiply component wise and at twelve minus ten minus three, it's negative one.
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