Trigonometry (Revised Edition) (1957 and similar items

Trigonometry (Revised Edition) (1957 Paperback) Author: None Stated Illustrator: None Stated Publisher: Cambridge Book Co. New York, NY U.S.A. 1957 Brief review of subject, 1st 92pp, followed by about 50-60 pages (last half of book pages not numbered) of historical test question from a formal certification process (1945-1957). Some tables of function values in last dozen or so pages to be used to provide values as answers. No author or test specifically identified. Studied paperback. Cover is ivory card stock with black lettering on spine front. Cover missing lower front corner, has POS on front, shows stains from handling/storage and has tear at head of spine stabilized with tape. Page-edges are marked with ownership notes. Computation inside rear cover. Interior is tight and complete, but has answers written on test questions within front section of exposition. Ownership test logistics marked on title page. Pages are brown with age. Size: 16mo - over 5 - 6" tall, around 180pps. (last half has unnumbered pages) Condition: Fair/Acceptable Softcover - Always Privately Owned. Copyright 1957. Stated revised edition, but no print-run or earlier edition info found. No ISBN, LCCN nor MSR. Notes on Condition/Edition ratings: Fine – means like new, but any book produced over 10 years ago isn't “brand new” or even “new.” Booksellers needed some word to describe this... Like New – A new book, no marks no damage (except maybe remainder marks or shelf-wear) except not obtained directly from the publisher or in packaging from the publisher. Very Good – How you or I might take care of a book, closer to “as new” than standard. Might show ownership. Good – How someone else might take care of a book. Also referred to as “standard.” This is the most likely condition for books of this age title, shows the book has been read or previously owned. Acceptable – How a child, student or a librarian might take care of a book. (Either trying to make sure someone doesn't steal it by plastering ownership everywhere, filled it with copious notes or a book that has been damaged.) Poor – Combination of “acceptable” factors above. Most likely with water damage as well. Might have missing pages (you should ask). Near – Means “almost” in an optimistic sense. e.g., “Near Fine” means very good, but on the high end. 1st Thus – Unique somehow, maybe 1st paperback, new illustrator, misprint or even the 1st edition. A collector might desire this copy. Thanks for looking!