direction cosine
noun Date: circa 1889 any of the cosines of the three angles between a directed line in space and the positive direction of the axes of a rectangular Cartesian coordinate system — usually used in plural

New Collegiate Dictionary. 2001.

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  • Direction cosine — In analytic geometry, the direction cosines of a vector are the cosines of the angles between the vector and the three coordinate axes. Or equivalently it is the component contributions to the unit vector. If v is a vector where is a basis. Then… …   Wikipedia

  • direction cosine — Math. the cosine of the angle made by a given vector and a coordinate axis. Cf. direction angle. [1890 95] * * * …   Universalium

  • direction cosine — noun : one of the cosines of the three angles between a directed line in space and the positive directions of the axes of a rectangular Cartesian coordinate system usually used in plural * * * Math. the cosine of the angle made by a given vector… …   Useful english dictionary

  • direction angle — Math. an angle made by a given vector and a coordinate axis. Cf. direction cosine. [1930 35] * * * …   Universalium

  • direction angle — noun : an angle made by a given line with an axis of reference; specifically : one of the three angles made by a straight line with the three axes of a rectangular coordinate system * * * Math. an angle made by a given vector and a coordinate… …   Useful english dictionary

  • Cosine similarity — is a measure of similarity between two vectors by measuring the cosine of the angle between them. The cosine of 0 is 1, and less than 1 for any other angle. The cosine of the angle between two vectors thus determines whether two vectors are… …   Wikipedia

  • cosine law — noun : either of two laws of radiation: a. : the radiant flux emitted in a given direction from a given small area of a perfectly diffusing surface varies as the cosine of the angle of emission b. : the irradiation by parallel rays falling on a… …   Useful english dictionary

  • Lambert's cosine law — See also: Lambertian reflectance In optics, Lambert s cosine law says that the radiant intensity observed from a Lambertian surface or a Lambertian radiator is directly proportional to the cosine of the angle θ between the observer s line of… …   Wikipedia

  • DIRCOL — Direction Cosine Linkage ( > IEEE Standard Dictionary ) …   Acronyms

  • DIRCOL — Direction Cosine Linkage ( > IEEE Standard Dictionary ) …   Acronyms von A bis Z

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