1. имя существительное 1) [математика] касательная 2) [математика] тангенс 3) [американский вариант английского языка, используется в разговорной речи] прямой участок железнодорожного пути Например: to fly / go off at / on a tangent — внезапно отклониться (от темы); сорваться, странно себя повести 2. прилагательное 1) [математика] касательный Синоним(ы): neighbouring 2) странный, неустойчивый 3) соприкасающийся, смежный
1) тангенс 2) касательная 3) касательный, касающийся Например: inflexional tangent to a curve — касательная в точке перегиба кривой tangent to a surface — касательная к поверхности
1) касательная 2) тангенс 3) прямой участок пути Например: tangent to a circle — касательная к окружности
I. adjective Etymology: Latin tangent-, tangens, present participle of tangere to touch; perhaps akin to Old English thaccian to touch gently, stroke 1. a. meeting a curve or surface in a single point if a sufficiently small interval is considered Example: straight line tangent to a curve b. (1) having a common tangent line at a point Example: tangent curves (2) having a common tangent plane at a point Example: tangent surfaces 2. diverging from an original purpose or course; irrelevant Example: tangent remarks II. noun Etymology: New Latin tangent-, tangens, from linea tangens tangent line 1. a. the trigonometric function that for an acute angle is the ratio between the leg opposite to the angle when it is considered part of a right triangle and the leg adjacent b. a trigonometric function that is equal to the sine divided by the cosine for all real numbers θ for which the cosine is not equal to zero and is exactly equal to the tangent of an angle of measure θ in radians 2. a line that is tangent; specifically a straight line that is the limiting position of a secant of a curve through a fixed point and a variable point on the curve as the variable point approaches the fixed point 3. an abrupt change of course; digression Example: the speaker went off on a tangent 4. a small upright flat-ended metal pin at the inner end of a clavichord key that strikes the string to produce the tone