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Trigonometry For Dummies, 2nd Edition by Mary Jane Sterling

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Chapter 1

Trouncing Trig Technicalities

In This Chapter

arrow Understanding what trigonometry is

arrow Speaking the language by defining the words

arrow Writing trig functions as equations

arrow Graphing for understanding

How did Columbus find his way across the Atlantic Ocean? How did the Egyptians build the pyramids? How did early astronomers measure the distance to the moon? No, Columbus didn't follow a yellow brick road. No, the Egyptians didn't have LEGO instructions. And, no, there isn't a tape measure long enough to get to the moon. The common answer to all these questions is trigonometry.

Trigonometry is the study of angles and triangles and the wonderful things about them and that you can do with them. For centuries, humans have been able to measure distances that they can't reach because of the power of this mathematical subject.

Taking Trig for a Ride: What Trig Is

“What's your angle?” That question isn't a come-on such as “What's your astrological sign?” In trigonometry, you measure angles in both degrees and radians. You can shove the angles into triangles and circles and make them do special ...

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