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Words related to cosine

co·sine
C c

  • arc cosine

    Trigonometry. the angle, measured in radians, that has a cosine equal to a given number. Symbol: cos −1. Abbreviation: arc cos;

  • law of cosines

    a law stating that the square of a side of a plane triangle is equal to the sum of the squares of the other two sides minus twice the product of the other sides multiplied by the cosine of the angle between them.

  • direction cosine

    the cosine of the angle made by a given vector and a coordinate axis.

  • inverse cosine

    arc cosine.

  • lambert's law

    the law that the luminous intensity of a perfectly diffusing surface in any direction is proportional to the cosine of the angle between that direction and the normal to the surface, for which reason the surface will appear equally bright from all directions.

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