ON PLANE AND SPHERICAL TRIGONOMETRY, AND ON TRIGONOMETRICAL TABLES AND LOGARITHMS, TOGETHER WITH A SELECTION OF PROBLEMS AND THEIR SOLUTIONS. Johnn BY J. HYMERS, D.D. LATE FELLOW AND TUTOR OF ST JOHN'S COLLEGE, CAMBRIDGE. FOURTH EDITION, REVISED. mo LONDON: LONGMAN, BROWN, GREEN, LONGMANS, AND ROBERTS. 1858. PLANE TRIGONOMETRY. CONTENTS. 10-15. Definitions of the Trigonometrical Ratios..... 16-19. Relations of the Trigonometrical Ratios to one another... 20-24. Use of the signs + and -to indicate contrariety of position 11 25-30. Magnitudes of angles unlimited. Method of reducing the Trigonometrical Ratios of all angles to those of angles 31-34. On the angles which correspond to given values of the difference of two augles.............. 38-39. Formule for the multiplication of angles.. 40-44. Formulæ for the division of angles............................. |