Consider the function f(x)= 3\sin (\frac{\pi}{3}(x−4))+5. State the am

nagasenaz

nagasenaz

Answered question

2021-10-11

Consider the function f(x)=3sin(π3(x4))+5.
State the amplitude A, period P, and midline. State the phase shift and vertical translation. In the full period [0, P], state the maximum and minimum y-values and their corresponding x-values.
Enter the exact answers.
Amplitude: A=
Period: P=
Midline: y=
The phase shift is:
a. up 4 units
b. 4 units to the right
c. 4 units to the left
d. 5 units to the left
The vertical translation is:
a. up 4 units
b. down 5 units
c. up 5 units
d. down 4 units
Hints for the maximum and minimum values of f(x):
The maximum value of y=sin(x) is y=1 and the corresponding x values are x=π2 and multiples of 2π less than and more than this x value. You may want to solve π3(x4)=π2.
The minimum value of y=sin(x) is y=1 and the corresponding x values are x=3π2 and multiples of 2π less than and more than this x value. You may want to solve π3(x4)=3π2.
If you get a value for x that is less than 0, you could add multiples of P to get into the next cycles.
If you get a value for x that is more than P, you could subtract multiples of P to get into the previous cycles.
For x in the interval [0, P], the maximum y-value and corresponding x-value is at:
x=
y=
For x in the interval [0, P], the minimum y-value and corresponding x-value is at:
x=
y=

Answer & Explanation

Alix Ortiz

Alix Ortiz

Skilled2021-10-12Added 109 answers

Step 1
Consider the provided question,
Given function, f(x)=3sin(π3(x4))+5
First find Amplitude, Period and Midline.
Amplitude=coefficient of sin(π3(x4))=3
Period =2πcoefficient of x=2ππ3=6
Midline: (y=vertical displacement): y=5
Step 2
Draw the graph of the given function,
image
Step 3 From the above diagram it is clear that,
phase shift is 4 units to the right.
So, the correct answer is option (b).
And the vertical translation is 5 units up (2+822=5)
So, the correct answer is option (c).
Step 4
Now, in the interval [0,P]=[0,6] the maximum value of y corresponding to x is,
From the above graph in the interval [0, 6],
The maximum value of y=8 corresponding to x=5.5
So, x=5.5
y=8
Step 5
In the interval [0,P]=[0,6] the minimum value of y corresponding to x is,
From the above graph in the interval [0, 6],
The minimum value of y=2 corresponding to x=2.5
So, x=2.5
y=2

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