**Tangent of an arc** — Tangent Tan gent, n. [L. tangens, entis, p. pr. of tangere to touch; akin to Gr. ? having seized: cf. F. tangente. Cf. {Attain}, {Contaminate}, {Contingent}, {Entire}, {Tact}, {Taste}, {Tax}, v. t.] (Geom.) A tangent line curve, or surface;… … The Collaborative International Dictionary of English

**Tangent** — Tan gent, n. [L. tangens, entis, p. pr. of tangere to touch; akin to Gr. ? having seized: cf. F. tangente. Cf. {Attain}, {Contaminate}, {Contingent}, {Entire}, {Tact}, {Taste}, {Tax}, v. t.] (Geom.) A tangent line curve, or surface; specifically … The Collaborative International Dictionary of English

**Tangent galvanometer** — Tangent Tan gent, n. [L. tangens, entis, p. pr. of tangere to touch; akin to Gr. ? having seized: cf. F. tangente. Cf. {Attain}, {Contaminate}, {Contingent}, {Entire}, {Tact}, {Taste}, {Tax}, v. t.] (Geom.) A tangent line curve, or surface;… … The Collaborative International Dictionary of English

**tangent** — /tan jeuhnt/, adj. 1. in immediate physical contact; touching. 2. Geom. a. touching at a single point, as a tangent in relation to a curve or surface. b. in contact along a single line or element, as a plane with a cylinder. 3. tangential (def.… … Universalium

**tangent** — I. adjective Etymology: Latin tangent , tangens, present participle of tangere to touch; perhaps akin to Old English thaccian to touch gently, stroke Date: 1594 1. a. meeting a curve or surface in a single point if a sufficiently small interval… … New Collegiate Dictionary

**Angle** — This article is about angles in geometry. For other uses, see Angle (disambiguation). Oblique angle redirects here. For the cinematographic technique, see Dutch angle. ∠, the angle symbol In geometry, an angle is the figure formed by two rays… … Wikipedia

**Tangent half-angle formula** — In various applications of trigonometry, it is useful to rewrite the trigonometric functions (such as sine and cosine) in terms of rational functions of a new variable t . These identities are known collectively as the tangent half angle formulae … Wikipedia

**tangent** — n. & adj. n. 1 a straight line, curve, or surface that meets another curve or curved surface at a point, but if extended does not intersect it at that point. 2 the ratio of the sides opposite and adjacent to an angle in a right angled triangle.… … Useful english dictionary

**Angle of entry** — An gle of en try (A[ e]ronautics) The angle between the tangent to the advancing edge (of an a[ e]rocurve) and the line of motion; contrasted with {angle of trail}, which is the angle between the tangent to the following edge and the line of… … The Collaborative International Dictionary of English

**tangent** — [tan′jənt] adj. [L tangens, prp. of tangere, to touch: see TACT] 1. that touches; touching 2. Geom. touching and not intersecting a curve or curved surface at one and only one point: said of a line or plane n. [< ModL ( linea) tangens, tangent … English World dictionary