{"product_id":"2940016336282","title":"ELEMENTS OF PLANE TRIGONOMETRY","description":"Author's Preface:\u003cbr\u003e\u003cbr\u003eThis work has been prepared for the use of beginners in the study of trigonometry. Assuming that a high degree of proficiency cannot be expected from such students, the author has limited himself to the selection of simple proofs of the formulas, not striving after original demonstrations. Geometrical proofs have been added in many cases, experience having shown that the student is assisted by them to a clearer understanding of the subject.\u003cbr\u003e\u003cbr\u003eThe student is expected, in technical institutions, to acquire facility in the use of the tables. All of the numerical examples have been computed by the author, with special-attention to correctness in the last decimal place, and the arrangement of the computations has been carefully considered. Five-place tables have been adopted, and the angles in the examples are given to the nearest tenth of a minute, because the instruments ordinarily used by engineers are read by the vernier only to the nearest minute of arc, while the angle corresponding to a computed function may be found usually to the nearest tenth of a minute by the use of five-place tables.\u003cbr\u003e\u003cbr\u003eCredit is due particularly to the works of Chauvenet, Snowball, Beasley, Woodhouse, Newcomb, and Todhunter, although many others have been consulted. A number of the illustrative examples in Art. All were taken from Gillespie's \"Land Surveying,\" the numerical values being assigned by the author of this work.\u003cbr\u003e\u003cbr\u003eThe author cannot hope that among so many examples there are no errors; he therefore requests those finding such to kindly notify him.\u003cbr\u003e\u003cbr\u003eRensselaer Polytechnic Institute, Troy, N. Y.","brand":"OGB","offers":[{"title":"Default Title","offer_id":47167613763824,"sku":"2940016336282","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/2940016336282_p0.jpg?v=1763633834","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/2940016336282","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}