### The Elements of Plane Trigonometry

##### By: Durfee, William Pitt, 1855

...RFEE Classic Literature Collection World Public Library.org PLANE TRIGONOMETRY Title: THE ELEMENTS OF PLANE TRIGONOMETRY Author: WILLIAM... ...... ...ew: First, to give the student an elementary knowledge of the science of Trigonometry, together with an introduction to the theory of functions as ... ...Three Sides . 98 APPENDIX Table of Ilnportant }'ormulas . 103 • PLANE TRIGONOMETRY CHAPTER I ON COMPUTATION 1. Suppose I measure this table an... ...garithms, to 7r, and to the various trigonometric ratios. 1 • 2 PLANE TRIGONOMETRY It is plain that an error of a foot_ in a mile is of far less... ...sor as many places to the right as are necessary to make the \ 4 PLANE TRIGONOMETRY 23.67 divisor an integer. The left-hand figure of 6123·11443... ... ] = t [log a + 2 log b - 4 log c] by III by II by I by III 6 PLANE TRIGONOMETRY 4. What is the logarithm of 22738 ? Since the number lies be... ... found; the result is the Inantissa of the fi ve figure number. 8 PLANE TRIGONOMETRY In most tables the multiplication spoken of above is per for... ...t0111S himself to making rough estimates of results. "rhen the 10 PLANE TRIGONOMETRY nature of the subject permits, these estimates may be obtain...

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