Amplitude Of Cosine Functions

1) Which function has amplitude 1?

Y = 2cos(4x)

Y = (1/4)cos(x)

Y = −3cos(x)

Y = cos(x)

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

−8

0

1

8

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

2

√2

1/√2

1

4) Which function has amplitude 4?

Y = (1/4)cos(x)

Y = cos(4x)

Y = cos(x) + 4

Y = 4cos(x)

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

9

−9

1

0

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

7/10

10/7

1

0

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

0

−1

1

2

8) Which function has amplitude 6?

Y = cos(6x)

Y = (1/6)cos(x)

Y = 6cos(x)

Y = cos(x) + 6

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

4

1

0

1/4

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

1

2

3

1/3

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

2

1/2

1

3/2

12) Which function has amplitude 7?

Y = cos(7x)

Y = (1/7)cos(x)

Y = cos(x) + 7

Y = 7cos(x)

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

1

3/4

−3/4

4/3

14) Which function has amplitude 2?

Y = 2cos(x)

Y = cos(2x)

Y = cos(x) + 2

Y = (1/2)cos(x)

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

0

−12

12

6

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

0

5/6

6/5

1

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

2/5

5/2

1/2

2

18) Which function has amplitude 11?

Y = cos(11x)

Y = cos(x) − 11

Y = 11cos(x)

Y = (1/11)cos(x)

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

5

−5

0

1

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

20

10

2

1

Amplitude of Cosine Functions