So far, you already know what the graph of the parent cosine function, [i][color=#1551b5]y = cos(x)[/color][/i], looks like. [br][br]In this applet below, you are given a graph of the function [color=#1551b5] [b]y = a cos(x) + d[/b][/color]. [br]As you already know, the values [color=#b20ea8]"a"[/color] & [color=#0a971e]"d"[/color] both affect the graph parent cosine function y = cos(x). [br]Your task here: Given the graph of [color=#1551b5][b]y = a cos(x) + d[/b][/color], determine the parameters [color=#b20ea8]"a"[/color] and [color=#0a971e]"d"[/color]. [br][br][i]Hint: The dashed horizontal line cuts the function in half. ([b]You should not need to zoom out at all. [[/i]i]In fact, you can't.[/i][/b]) [br][br]As you determine the values of [color=#b20ea8]"a"[/color] and [color=#0a971e]"d"[/color], enter them in the input boxes. [i][color=#c51414][b]Once you're correct, you'll know it! [/b][/color] [br][/i][br]Click the "Generate New Wave" button as many times as you need until you've mastered this concept! [br][br][color=#0a971e][b]GOOD LUCK!!![/b][/color]

For additional practice in determining the values of the parameters "a" and "d" from viewing the graph of y = a sin(x), go to http://tube.geogebra.org/m/1537267