Trigonometry Workbook for Dummies
Chapter One
Tackling Technical Trig
In This Chapter
* Acquainting yourself with angles
* Identifying angles in triangles
* Taking apart circles
Angles are what trigonometry is all about. This is where it all started, way back when.
Early astronomers needed a measure to tell something meaningful about the sun and
moon and stars and their relationship between man standing on the earth or how they were
positioned in relation to one another. Angles are the input values for the trig functions.
This chapter gives you background on how angles are measured, how they are named, and
how they relate to one another in two familiar figures, including the triangle and circle. A lot
of this material is terminology. The words describe things very specific, but this is a good
thing, because they're consistent in trigonometry and other mathematics.
Getting Angles Labeled by Size
An angle is formed where two rays (straight objects with an endpoint that go on forever in
one direction) have a co ... read full excerpt from Trigonometry Workbook For Dummies ebook
