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Home > PC > Chapter 4 > Lesson 4.2.2 > Problem 4-88

4-88.

Find an equation in terms of sine and an equation in terms of cosine for the graph shown below. 

Periodic curve, x axis scaled from negative 2 pi to 2 pi, with 4 visible turning points, first @ (negative 3 halves pi, comma negative 2), second @ (negative 1 half pi, comma 4).

Find the mid-line of the graph.

Added to curve: horizontal line at y = 1.

What is the vertical shift?

What is the amplitude?

What is the easiest shift for the sine?

What is the easiest shift for the cosine?

Flip it upside down.

Horizontal shift to the left .

Use the eTool below to visualize this problem.
Click on the link to the right to view the full version of the eTool: PCT 4-88 eTool