Plane trigonometry

MxTOH that is superfluous to a complete scientific understanding ofT rigonometry has crept into the classroom and the text, book in recent years, and the time allotted to the study has been insufficient for the class to master it all. In the attempt there has too often resulted a superficial acquaintance with a mass of principles, but not a thorough familiarity with the essential truths. Nor has the usual course always produced a satisfactory skill in operating with these new processes and with the instruments of calculation that Trigonometry employs. This book is the product of an experience of fifteen years in teaching the subject, and presents the essential elements ofT rigonometry in a manner that is believed to be both sound and teachable. The order of development of the science is substantially the same as that of our best texts, but only such material as is necessary to a complete understanding and knowledge of the subject has been incorporated in its treatment. Principles are developed and their application to problems is made immediately; formulas are derived and they are made of real value to the pupil by instant use; difficulties are foreseen and the mind of the learner is made the more ready to overcome them; correlated formulas are grouped and are invariably succeeded by exercises employing them in their solution.
(Typographical errors above are due to OCR software and don't occur in the book.)

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