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Reference Angles/Triangles Formed by Angles in Quadrants With Labels
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Description: Lines drawn to horizontal to form triangle ratios (reference triangles, angles). Axes, quadrants, abscissa, ordinate, and distance labeled.
Source: Claude Irwin Palmer Library of Practical Electricity: Practical Mathematics For Home Study (New York: McGraw-Hill Book Company, Inc., 1919) 405
Keywords: trigonometric angle, reference triangle, reference angle, angles, triangles, quadrants, trigonometry, trig ratios, abscissa, ordinate, distance
Copyright: 2009, Florida Center for Instructional Technology. See license.
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