Graphing a Cosine Graph with a Reflection

The video tutorial covers the graphing of the function f(x) = -cos(4x). It begins with an introduction to the function and explains the concepts of amplitude and period. The tutorial then guides through the steps to graph the cosine function, including identifying key points and understanding the reflection. Finally, it concludes with a discussion on transformations and how to apply them to the graph.

What is the amplitude of the function f(x) = -cos(4x)?

• 4

• 1

• 0

• -1

How do you calculate the period of the function f(x) = -cos(4x)?

• 2π multiplied by B

• B divided by 2π

• B multiplied by 2π

• 2π divided by B

What is the period of the function f(x) = -cos(4x)?

• 2π

• π/2

• 4π

• π/4

How many key points are needed to graph one cycle of a cosine function?

• 5

• 3

• 2

• 4

What effect does the negative sign have on the graph of f(x) = -cos(4x)?

• It shifts the graph up

• It shifts the graph down

• It stretches the graph

• It reflects the graph