Orthogonal
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Orthogonal
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Originally, at right angles; later generalized to mean the vanishing of a
sum (or integral) of products.
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The cosine of the angle between two vectors V1 and V2 with the
respective components x_{1}, y_{1}, z_{1}, and x_{2}, y_{2}, z_{2} is proportional to the sum of
products x_{1}x_{2} + y_{1}y_{1} + z_{1}z_{2}. Hence, if the vectors are perpendicular, the
latter sum equals zero. For this reason any two series of numbers (x_{1}, x_{2}, ...
x_{n}) and (y_{1}, y_{2}, ...y_{n}) is said to be orthogonal if
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References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use