cotangent kotânžânt (#) Fr.: cotangent The → tangent of the complement of an arc or angle; abbreviation cot. If θ is an → acute angle of a → right angle, cot θ = (adjacent side)/(opposite side). |
tangent 1) sâyân (#); 2) tânžânt Fr.: tangente 1) A straight line or plane that touches a curve or curved surface at one and only one
point. Conversely, a curve or curved surface that touches a straight line, curve, or curved
surface at one and only one point. From L. tangentem (nominative tangens), pr.p. of tangere "to touch," from PIE base *tag- "to touch, to handle" (cf. L. tactus "touch," Gk. tetagon "having seized," O.E. þaccian "stroke, strike gently"); tânžânt, loan from Fr. 1) Sâyân, pr.p. of sâyidan "to touch, to rub," variants
sâbidan, pasâvidan;
Khotanese sauy- "to rub;" Sogdian ps'w- "to touch;" ultimately
Proto-Iranian *sau- "to rub." |
tangential sâyâni (#) Fr.: tangentiel Pertaining to or of the nature of a tangent. |
tangential motion jonbeš-e sâyâni Fr.: mouvement tangentiel That component of a an object's motion which is perpendicular to the observer's → line of sight. → tangential; → motion. |
tangential velocity tondâ-ye sâyâni Fr.: vitesse tangentielle 1) The instantaneous linear velocity of a body moving in a circular path.
It is equal to the → angular velocity multiplied
by the radius: v_{t} = ωr. → tangential; → velocity. |
tangentially polarized light nur-e qotbide-ye sâyâni Fr.: lumière polarisée tangentiellement The → linearly polarized light that vibrates perpendicularly to an imaginary line joining the source to the point of observation. Tangentially, adverb of → tangential; → polarized; → light. |