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GeoGebra

Graphs of Sine & Cosine Functions

Auteur:L. Marizza A. Bailey, Tim Brzezinski
Move the knob on each slider and observe what each does. Make sure to take note so that you can answer the questions in the subsequent tasks. or

1.

The parameter a is called the amplitude of either graph. How would you describe the term amplitude in your own words?

2.

What does the amplitude a do to the graph of either function?

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3.

The period of a function is the length of the largest interval in its domain before it repeats itself.The sine and cosine functions are said to be periodic functions because they have periods. To learn more about periodic functions, click here. What is the period of both parent functions or ? (If you need a hint, click here.)

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4.

The parameter b gives the period of the function by the formula . What happens to the wave if b is between 0 and 1?

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5.

How does the parameter c affect the graph of either parent function? How does the graph of this parent function change as c increases

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6.

How does the parameter d affect the graph of either parent function? How does the graph of this parent function change as d increases?

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7. Move the sliders to create a sine graph with amplitude: 3 and period 2 (or close to it)

8. Move the sliders to create a cosine graph with amplitude: 2 and period 3 (or close to it) shifted down by 1.

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