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Size of this JPG preview of this PDF file: 463 × 599 pixels. Other resolutions: ... The supplementary teacher's guide for the High School Trigonometry Wikibook.
An introduction to trigonometry; Benjamin Banneker's Trigonometry Puzzle at Convergence; Dave's short trig course; Trigonometric Delights, by Eli Maor, Princeton University Press, 1998. Ebook version, in PDF format, full text presented. Trigonometry by Alfred Monroe Kenyon and Louis Ingold, The Macmillan Company, 1914. In images, full text ...
The book advocates replacing the usual basic quantities of trigonometry, Euclidean distance and angle measure, by squared distance and the square of the sine of the angle, respectively. This is logically equivalent to the standard development (as the replacement quantities can be expressed in terms of the standard ones and vice versa).
Harold R. Jacobs (born 1939), who authored three mathematics books, both taught the subject and taught those who teach it. [1] Since retiring he has continued writing articles, and as of 2012 had lectured "at more than 200" math conferences. His books have been used by some homeschoolers [2] and has inspired followup works.
Trigonometry was still so little known in 16th-century northern Europe that Nicolaus Copernicus devoted two chapters of De revolutionibus orbium coelestium to explain its basic concepts. Driven by the demands of navigation and the growing need for accurate maps of large geographic areas, trigonometry grew into a major branch of mathematics. [27]
After his first book was published, Saxon published more books: Algebra 1 1/2, Algebra 1/2 and Geometry, Trigonometry and Algebra 3. (He later renamed his book Algebra 1 1/2 simply Algebra 2). His reasoning for titling his second textbook Algebra 1 1/2 is that a good part of the book was a review of Algebra 1 topics.
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