Reference Angles/Triangles Formed by Angles in Quadrants With Labels

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Lines drawn to horizontal to form triangle ratios (reference triangles, angles). Axes, quadrants, abscissa, ordinate, and distance labeled.

Keywords

triangles, angles, Distance, trigonometry, quadrants, trigonometric angle, reference triangle, reference angle, trig ratios, abscissa, ordinate

Galleries

Trigonometry: Angles

Source

Claude Irwin Palmer Library of Practical Electricity: Practical Mathematics For Home Study (New York: McGraw-Hill Book Company, Inc., 1919) 405

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