Trigonometry: Analytical, Plane and Spherical; With Logarithmic Tables

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Fb&c Limited, 26 de juny 2015 - 263 pàgines
Excerpt from Trigonometry: Analytical, Plane and Spherical; With Logarithmic Tables

An author of a new trigonometry, at the present time, owes an explanation if not apology, both to teachers and students, for adding another to the already too numerous works upon this subject. The author was frequently applied to for opinions upon works extant and those proposed for publication, but found none that quite suited him; so the present work was undertaken to provide for his own classes and avoid further annoyance in being called upon to criticise others, even though it furnishes one more book for other critics to pass upon. The author found, however, when he had reduced his ideas to a form ready for print, that he did not differ from certain other writers as much as he, at first, expected to; still the many distinctive characteristics which remain will, we trust, commend themselves to others.

Attention is called to the fact that the trigonometrical functions are first defined and treated as ratios, but that afterwards they are represented by lines, which lines are so defined as to represent the functions.

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