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Geometry: The Unit Circle and Trigonometry

The Unit Circle and TrigonometryGeometryThe Unit Circle and TrigonometryThe Tangent RatioThe Sine RatioThe Cosine RatioAnd the RestHow Does This Relate to the Unit Circle? Trigonometry is the…

Willis, Thomas

(Encyclopedia) Willis, Thomas, 1621–75, English physician and anatomist. He became professor at Oxford in 1660 and in 1666 established a practice in London. An authority on the brain and the nervous…

Korolenko, Vladimir Galaktionovich

(Encyclopedia) Korolenko, Vladimir GalaktionovichKorolenko, Vladimir Galaktionovichvlədyēˈmĭr gələktyôˈnəvĭch kərəlyĕnˈkə [key], 1853–1921, Russian short-story writer and publicist. A member of a…

vernier

(Encyclopedia) vernierverniervûrˈnēr [key], auxiliary scale, either straight or an arc of a circle, designed to slide along a fixed scale. Its unit divisions, usually smaller than those on the fixed…

logical positivism

(Encyclopedia) logical positivism, also known as logical or scientific empiricism, modern school of philosophy that attempted to introduce the methodology and precision of mathematics and the natural…

molding

(Encyclopedia) CE5 Moldings molding, in architecture, furniture, and decorative objects, a surface or group of surfaces of projecting or receding contours. A molding may serve as a defining…

tangent

(Encyclopedia) tangent, in mathematics. 1 In geometry, the tangent to a circle or sphere is a straight line that intersects the circle or sphere in one and only one point. For other curves and…

Rovaniemi

(Encyclopedia) RovaniemiRovaniemirôˈvänēˌĕmē [key], city (1996 pop. 57,389), capital of Lapland prov., N Finland, at the confluence of the Ounas and Kemi rivers. Commercial and agricultural fairs and…

secant

(Encyclopedia) secant, in mathematics. 1 In geometry, a secant is a straight line cutting a curve or surface. If it intersects the curve in two different points, as in the secant of a circle, the…