An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 4 Search : cosine
 cosine   کوسینوس   kosinus (#)Fr.: cosinus   A trigonometric function giving the ratio of the side adjacent to a given angle to the hypotenuse.Mod.L. complementi sinus, → com-; → sine. hyperbolic cosine   کوسینوس ِ هذلولی   kosinus-e hozluliFr.: cosinus hyperbolique   A function, denoted cosh x, defined for all real values of x, by the relation: cosh x = (1/2) (ex + e-x).→ hyperbolic; → cosine. Lambert's cosine law   قانون ِ کوسینوس ِ لامبرت   qânun-e cosinus-e LambertFr.: loi en cosinus de Lambert   The intensity of the light emanating in any given direction from a perfectly diffusing surface is proportional to the cosine of the angle between the direction and the normal to the surface. Also called → Lambert's law.→ lambert; → cosine; → law. law of cosines   قانون ِ کوسینوس‌ها   qânun-e kosinushâFr.: loi des cosinus   An expression that for any triangle relates the length of a side to the cosine of the opposite angle and the lengths of the two other sides. If a, b, and c are the sides and A, B, and C are the corresponding opposites angles: a2 = b2 + c2 - 2bc cos A; b2 = c2 + a2 - 2ca cos B; c2 = a2 + b2 - 2ab cos C.→ law; → cosine.