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Math › Trigonometry › Trig Graphs › Cosine Graph

Amplitude of Cosine Functions

Grade 12th

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| By Thames

T

Thames

Community Contributor

Quizzes Created: 7288 | Total Attempts: 9,526,295

| Questions: 20 | Updated: Nov 25, 2025

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Question 1 / 20

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1) Which function has amplitude 1?

Y = 2cos(4x)

Y = (1/4)cos(x)

Y = −3cos(x)

Y = cos(x)

Submit

About This Quiz

Amplitude Of Cosine Functions - Quiz

Amplitude tells you how “tall” a cosine wave is from the midline to its peak. In this quiz, you’ll explore how coefficients affect the amplitude of cosine functions. You’ll match equations with their correct wave heights and learn to quickly spot how the number in front of cosine changes the... see moregraph. Try this quiz to build confidence in reading amplitudes.
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2) What first name or nickname would you like us to use?

You may optionally provide this to label your report, leaderboard, or certificate.

2) What is the amplitude of y = −8cos(x)?

−8

0

1

8

Submit

3) What is the amplitude of y = √2 cos(x)?

2

√2

1/√2

1

Submit

4) Which function has amplitude 4?

Y = (1/4)cos(x)

Y = cos(4x)

Y = cos(x) + 4

Y = 4cos(x)

Submit

5) What is the amplitude of y = −9cos(x)?

9

−9

1

0

Submit

6) What is the amplitude of y = (7/10)cos(x)?

7/10

10/7

1

0

Submit

7) What is the amplitude of y = −cos(x)?

0

−1

1

2

Submit

8) Which function has amplitude 6?

Y = cos(6x)

Y = (1/6)cos(x)

Y = 6cos(x)

Y = cos(x) + 6

Submit

9) What is the amplitude of y = (1/4)cos(x)?

4

1

0

1/4

Submit

10) What is the amplitude of y = (1/2)cos(x)?

2

1/2

1

3/2

Submit

11) Which function has amplitude 7?

Y = cos(7x)

Y = (1/7)cos(x)

Y = cos(x) + 7

Y = 7cos(x)

Submit

12) What is the amplitude of y = −(3/4)cos(x)?

1

3/4

−3/4

4/3

Submit

13) Which function has amplitude 2?

Y = 2cos(x)

Y = cos(2x)

Y = cos(x) + 2

Y = (1/2)cos(x)

Submit

14) What is the amplitude of y = −12cos(x)?

0

−12

12

6

Submit

15) What is the amplitude of y = (5/6)cos(x)?

0

5/6

6/5

1

Submit

16) What is the amplitude of y = (2/5)cos(x)?

2/5

5/2

1/2

2

Submit

17) Which function has amplitude 11?

Y = cos(11x)

Y = cos(x) − 11

Y = 11cos(x)

Y = (1/11)cos(x)

Submit

18) What is the amplitude of y = −5cos(x)?

5

−5

0

1

Submit

19) What is the amplitude of y = 10cos(2x)?

20

10

2

1

Submit

20) What is the amplitude of y = 3cos(x)?

1

2

3

1/3

Submit

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All (20)
Unanswered ()
Answered ()

Which function has amplitude 1?

What is the amplitude of y = −8cos(x)?

What is the amplitude of y = √2 cos(x)?

Which function has amplitude 4?

What is the amplitude of y = −9cos(x)?

What is the amplitude of y = (7/10)cos(x)?

What is the amplitude of y = −cos(x)?

Which function has amplitude 6?

What is the amplitude of y = (1/4)cos(x)?

What is the amplitude of y = (1/2)cos(x)?

Which function has amplitude 7?

What is the amplitude of y = −(3/4)cos(x)?

Which function has amplitude 2?

What is the amplitude of y = −12cos(x)?

What is the amplitude of y = (5/6)cos(x)?

What is the amplitude of y = (2/5)cos(x)?

Which function has amplitude 11?

What is the amplitude of y = −5cos(x)?

What is the amplitude of y = 10cos(2x)?

What is the amplitude of y = 3cos(x)?

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