April 2019
Beginner
368 pages
9h 38m
English
Content preview from Pre-Calculus Workbook For Dummies, 3rd Edition
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Chapter 7
Graphing and Transforming Trig Functions
IN THIS CHAPTER
Exploring periodic graphs
Graphing sine and cosine
Picturing tangent and cotangent
Charting secant and cosecant
Graphing a trig function is similar to graphing any other function. You simply insert values into the input to find the output. In this case, the input is typically 
and the output is typically y. And, just like graphing any other function, knowing the parent trig graph — the most basic, unaltered graph — makes the task of graphing more complex graphs much easier. In this chapter, you see the parent graph of each trig function and some of its transformations.
Getting a Grip on Periodic Graphs
Periodic graphs are like other graphs of functions that keep going, and going, and going. But these graphs have a really special property: They keep repeating and repeating the same set of values over and over. Just remember that trig functions are periodic graphs, and the steps to graphing them will be easy! Because ...
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