Overview

Trigonometry is Useful When we first learn the basics of trigonometry, we are taught about the three basic functions: sin, cos, and tan. For the first couple of years, we only worry about angles between 0 and 180 degrees, and we don't really think about radians at all, or the full 360 degree domain. However, as we progress to the applications of Trigonometry in the various sciences, we often lose sight of the fact that it can be very useful to be able to approximate the values of trigonometric ratios of angles between 0 and 360 degrees. These values occur all the time in various intermediate calculations, and we can tell at a glance that a value is wrong if it has the wrong sign in the wrong quadrant, or if it it very close to 1 when it should, in fact, be very close to zero. This book will help you approximate the values of standard ratios of any angle at all. I hope you find it very useful.

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