A concise and accessible guide to understanding the fundamentals of trigonometry. An essential resource for students and educators alike. 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 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. 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.

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.

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 is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.