A Key To Elementary Trigonometry

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Examples - I (pp. 1, 2). (1) 4 feet 6 inches =54 inches; .'. number is 54. (2) 15 feet 2 inches = 182 inches; .*. number is 182 / 7 or, 26. (3) Unit of square measurement is (192 / 12) square inches, or, 16 square inches; .*. unit of linear measurement is the sq. root of 16 inches, or, 4 inches. (4) Unit of square measurement is (1000 / 40) square inches, or, 25 square inches; .*. unit of linear measurement is the sq. root of 25 inches, or, 5 inches. (5) Unit of cubic measurement is (216 / 8) cubic inches, or, 27 cubic inches .* unit of linear measurement is the cube root of 27 inches or, 3 inches. (6) Unit of cubic measurement is (2000 / 16) cubic inches, or, 125 cubic inches; .'. unit of linear measurement is cube root of 125 inches, or, 5 inches.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Excerpt from Key to Mr. J. B. Lock's Elementary Trigonometry The student will observe that for a given quantity if the unit be increased or decreased the measure is decreased or increased proportionally; i. E. For a given quantity the measure and unit vary inversely. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Solutions of the Examples in Hall and Knight's Elementary Trigonometry IN preparing this Key two objects have been kept in view. It is intended first to save the time and lighten the work of teachers, and secondly to afford help to those who study Mathematics without the guidance of a teacher. Accordingly the solutions have generally been given in the most simple and natural manner, with frequent reference to the text and examples in the Elementary Trigonometry. In particular, the solutions which involve logarithmic work have been presented in the fullest detail, so that with the help of the Key, a teacher will be able very readily to discover and correct mistakes in the work of his pupils. For very many of the solutions I am indebted to Mr H. C. Playne of Clifton College, and my thanks are due to him for valuable help all through the book. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.