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sasho [114]
3 years ago
11

A sine function has the following key features:

Mathematics
2 answers:
boyakko [2]3 years ago
8 0

Answer:

Hence the function is given by:

y=4\sin (\dfrac{\pi x}{6})+1

Step-by-step explanation:

Let the general function be given by:

y=a\sin (bx)+c

As we know that period of \sin x is 2\pi.

Hence for period to be 12 we have to consider the function as:

\sin (\dfrac{\pi x}{6})

Hence b=\dfrac{\pi}{6}

Also the midline is y=1. this means that the minimum and maximum value are at the same distance from y=1.

also the amplitude of the function is 4.

i.e. the maximum value of the function is 4+1=5.

and the minimum value is -4+1=-3

Also y-intercept is (0,1) i.e. when x=0 y takes the value as 1.

i.e. c=1.

Hence the function is given by:

y=4\sin (\dfrac{\pi x}{6})+1


Vlad1618 [11]3 years ago
3 0
Answer: 4 sin[ (π/6)x ] + 1

Compared with the parent function y= sin(x), the graph of 4 sin[ (π/6)x ] + 1 will be strecthed vertically by a scale factor of 4, translated 1 unit up, and with a shorter distance between the peaks.

Soluton:

1) The parent function is sin(x)

2) sin(x) has:

Middle line: y = 0

Amplitude: 1 because the function goes from 1 unit up to 1 unit down the midddle line.

Period: 2π because sine function repeats every 2π units.

y-intercept: (0,0) because sin(0) = 0.

Now look how these changes in the function reflect on the parameters:

A sin (ωx + B) + C:

That function will have:

 amplitude A, becasue the amplitude is scaled by that factor

Period: 2π / ω, because the function is compressed horizontally by that factor.

It will be translated B units to the left

It will be translated C units up.

And you need

Period = 12 => 2π / ω = 12 => ω = π/6

 A = 4

Translate the midline from y = 0 to y = 1 => shift the function 1 unit up => C = 1.

Translate the y-intercept from y = 0 to y = 1, which is already accomplished when you translate the function 1 unit up.

So, the is the function searched>

y = A sin (ωx + B) + C = 4 sin[ (π/6)x ] + 1

Now you can check the amplitude, the period, the middle line and the y-intercept of that y = 4 sin[ (π/6)x ] + 1.

I strongly suggest that you graph it with a graphing program or calculator.


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Consider a circle whose equation is x2 + y2 – 2x – 8 = 0. Which statements are true? Select three options.
Alla [95]

Considering the given equation of the circle, the true statements are given as follows:

  • The radius of the circle is of 3 units.
  • The center of the circle lies on the x-axis.
  • The circle has the same radius as the circle with equation x² + y² = 9.

<h3>What is the equation of a circle?</h3>

The equation of a circle of center (x_0, y_0) and radius r is given by:

(x - x_0)^2 + (y - y_0)^2 = r^2

The equation given is:

x2 + y² - 2x - 8 = 0.

Completing the squares, the equation is given as follows:

(x - 1)² + y² = 8 + 1

(x - 1)² + y² = 9.

Researching the problem on the internet, the true statements are:

  • The radius of the circle is of 3 units.
  • The center of the circle lies on the x-axis(y_0 = 0).
  • The circle has the same radius as the circle with equation x² + y² = 9.

More can be learned about the equation of a circle at brainly.com/question/24307696

#SPJ1

8 0
2 years ago
True or False?The first distribution shown below has a smaller standard deviation than does the second distribution.1, 2, 3, 4,
Mandarinka [93]

Answer:

False, they have the same standard deviation

Step-by-step explanation:

Standard deviation is the distance each data value is from the mean.

While the mean of each data set will be different, the distance each data value is from this mean will be the same.  This is because each set goes sequentially from 1 to 12, or from 101 to 112.  The average distance from the mean will have to be the same.

To verify, using a graphing calculator, the standard deviation of the first set is 3.45.  The standard deviation of the second set is also 3.45.

6 0
3 years ago
Read 2 more answers
Eric had 15.3 feet of fishing line. He cut off a piece and had 38.4 inches left. How long was the piece he cut off?
Lena [83]

Answer:

x = 145.2

Step-by-step explanation:

Convert 15.3 ft to inches = 183.6

Exquation:

183.6 - x = 38.4

-x = 38.4 - 183.6

-x = -145.2

x = 145.2

7 0
3 years ago
Angle B is 45% of angle A. Angle C is 35% of angle A. What is the measurement of angle A?
mafiozo [28]

We assume , A, B, and C are angles of a triangle.
The sum of angles of a triangle is equal to 180º; therefore:
A+B+C=180º

B is 45% of angle A; then B=0.45A
C is 35% of anble A; Then C=0.35A

We can suggest this equation;
A+0.45A+0.35A=180
1.8A=180
A=180/1.8
A=100

Answer: The measurement of angle A is 100º.
3 0
3 years ago
For how many three digit numbers (100 to 999) is the sum of the digits even? (For example, 343 has an even sum of digits: 3 + 4
n200080 [17]

Answer:

there are 425 numbers of three digits whose the sum of the digits is even.

Step-by-step explanation:

Option 1:

It is necessary to accomplish one of the next conditions:

(1) all of the digits are even.

(2) exactly 2 of the digits are odd

Then, for the first condition:

4x5x5 = 100 -> this is because the first digit can not be 0.

for the second condition:

(3C1)*5*5*5-1*5*5 =3*125-25=350

where 3C1 is a combination.  The 3C1 determines which of the three digits is even, and it is necessary to subtract the numbers under 100 with the other 2 digits odd.

So, there are 450 numbers of three digits whose the sum of the digits is even.

Option 2:

there are 900 three digit number and 5*5*5 =125 has 3 odd numbers and 5*5*5+4*5*5+4*5*5=325 has 1 odd number, so there are 450 numbers of three digits whose the sum of the digitis is odd, so 900-450 whose the sum of the digits is even.

4 0
3 years ago
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