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Peer reviewedGearhart, William B.; Shultz, Harris S. – College Mathematics Journal, 1990
Presents some examples from geometry: area of a circle; centroid of a sector; Buffon's needle problem; and expression for pi. Describes several roles of the trigonometric function in mathematics and applications, including Fourier analysis, spectral theory, approximation theory, and numerical analysis. (YP)
Descriptors: Calculus, College Mathematics, Functions (Mathematics), Geometry
Peer reviewedCohen, Martin P. – Mathematics Teacher, 1983
Study of circular transformation and its associated properties is proposed as review and reinforcement of familiar concepts and for developing broader understanding of transformations. Inversion on a circle is discussed in some detail. (MNS)
Descriptors: Functions (Mathematics), Geometric Concepts, Geometry, Learning Activities
