Common
Direction cosine
Cosines of the angles between a vector and the coordinate axes
Cosines of the angles between a vector and the coordinate axes
In analytic geometry, the direction cosines (or directional cosines) of a vector are the cosines of the angles between the vector of interest and each of the three positive coordinate semiaxes. Equivalently, they are the contributions of each component of the basis to a unit vector in that direction.
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