Rewrite the function using the power-reducing formulas.
f(x) = cos2 x

Answers

Answer 1

Answer:

f(x) = cos 2x = 2 cos^2 x - 1

Step-by-step explanation:

Here, we want to rewrite the given function using the power reducing formula

f(x) = cos 2x

Recall;

cos 2x = cos(x + x)

= cos x • cos x - sin x• sin x

= cos^2 x - sin^2 x

But Sin^2 x = 1 - cos^2x

Thus;

Cos^2x - sin^2 x = cos^2 x - (1 - cos^2 x)

= cos^2 x + cos^2 x - 1 = 2 cos^2 x - 1


Related Questions

An automatic filling machine is used to fill 2-litre bottles of cola. The machine’s output is known to be approximately Normal with a mean of 2.0 litres and a standard deviation of 0.01 litres. Output is monitored using means of samples of 5 observations.
Determine the upper and lower control limits that will include roughly 95.5 percent of the sample means.
If the means for 6 samples are 2.005, 2.001, 1.998, 2.002, 1.995 and 1.999, is the process in control?

Answers

The upper control limit (UCL) is approximately 2.0018 litres, and the lower control limit (LCL) is approximately 1.9982 litres, which would include roughly 95.5 percent of the sample means.

Now let's check if the process is in control using the given sample means:

To determine the upper and lower control limits for the sample means, we can use the formula:

Upper Control Limit (UCL) = Mean + (Z * Standard Deviation / sqrt(n))

Lower Control Limit (LCL) = Mean - (Z * Standard Deviation / sqrt(n))

In this case, we want to include roughly 95.5 percent of the sample means, which corresponds to a two-sided confidence level of 0.955. To find the appropriate Z-value for this confidence level, we can refer to the standard normal distribution table or use a calculator.

For a two-sided confidence level of 0.955, the Z-value is approximately 1.96.

Given:

Mean = 2.0 litres

Standard Deviation = 0.01 litres

Sample size (n) = 5

Using the formula, we can calculate the upper and lower control limits:

UCL = 2.0 + (1.96 * 0.01 / sqrt(5))

LCL = 2.0 - (1.96 * 0.01 / sqrt(5))

Calculating the values:

UCL ≈ 2.0018 litres

LCL ≈ 1.9982 litres

Therefore, the upper control limit (UCL) is approximately 2.0018 litres, and the lower control limit (LCL) is approximately 1.9982 litres, which would include roughly 95.5 percent of the sample means.

Now let's check if the process is in control using the given sample means:

Mean of the sample means = (2.005 + 2.001 + 1.998 + 2.002 + 1.995 + 1.999) / 6 ≈ 1.9997

Since the mean of the sample means falls within the control limits (between UCL and LCL), we can conclude that the process is in control.

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True or false: A set is considered closed if for any members in the set, the result of an operation is also in the set

Answers

False. A set is considered closed under an operation if the result of that operation on any two elements in the set also belongs to the set.

A set is considered closed if it contains all of its limit points. In other words, if a sequence of points in the set converges to a point that is also in the set, then the set is closed. Another equivalent definition is that the complement of the set.

In mathematics, sets are collections of distinct objects. These objects can be anything, including numbers, letters, or even other sets. The concept of sets is fundamental in mathematics and is used to define many other mathematical structures.

Sets can be denoted in various ways, including listing the elements inside curly braces { }, using set-builder notation, or using set operations to define new sets from existing ones. Some common set operations include union, intersection, difference, and complement.

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y=xto the power of 2+4x-12

Answers

The equation \(y = x^2 + 4x - 12\) represents a parabolic curve in a 2D coordinate system.

What is graph?

A graph is a concept in mathematics and computer science that involves a set of nodes or vertices, linked together by edges to depict the interconnections between objects. Graphs are a powerful method for examining complex relationships within diverse systems, including communication networks, transportation systems, and social networks.

To graph this equation, you can follow these steps:

Choose a range of values for x that you want to plot. For example, you might choose x values from -6 to 2.

For each x value, calculate the corresponding y value by plugging it into the equation. For example, if x = -6, then y = \((-6)^2\) + 4(-6) - 12 = 0.

Plot each (x, y) pair on the graph.

Connect the plotted points with a smooth curve to represent the parabolic shape of the equation.

Using these steps, you can graph the equation \(y = x^2 + 4x - 12\) to visualize its shape and better understand its behavior.

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y=xto the power of 2+4x-12

Consider the vectors: a=(1,1,2),b=(5,3,λ),c=(4,4,0),d=(2,4), and e=(4k,3k)
Part(a) [3 points] Find k such that the area of the parallelogram determined by d and e equals 10 Part(b) [4 points] Find the volume of the parallelepiped determined by vectors a,b and c. Part(c) [5 points] Find the vector component of a+c orthogonal to c.

Answers

The value of k is 1, the volume of the parallelepiped is 12 + 4λ, and the vector component of a + c orthogonal to c is (1,1,1.5).

a) Here the area of the parallelogram determined by d and e is given as 10. The area of the parallelogram is given as `|d×e|`.

We have,

d=(2,4)

and e=(4k,3k)

Then,

d×e= (2 * 3k) - (4 * 4k) = -10k

Area of parallelogram = |d×e|

= |-10k|

= 10

As we know, area of parallelogram can also be given as,

|d×e| = |d||e| sin θ

where, θ is the angle between the two vectors.

Then,10 = √(2^2 + 4^2) * √((4k)^2 + (3k)^2) sin θ

⇒ 10 = √20 √25k^2 sin θ

⇒ 10 = 10k sin θ

∴ k sin θ = 1

Therefore, sin θ = 1/k

Hence, the value of k is 1.

Part(b) The volume of the parallelepiped determined by vectors a, b and c is given as,

| a . (b × c)|

Here, a=(1,1,2),

b=(5,3,λ), and

c=(4,4,0)

Therefore,

b × c = [(3 × 0) - (λ × 4)]i + [(λ × 4) - (5 × 0)]j + [(5 × 4) - (3 × 4)]k

= -4i + 4λj + 8k

Now,| a . (b × c)|=| (1,1,2) .

(-4,4λ,8) |=| (-4 + 4λ + 16) |

=| 12 + 4λ |

Therefore, the volume of the parallelepiped is 12 + 4λ.

Part(c) The vector component of a + c orthogonal to c is given by [(a+c) - projc(a+c)].

Here, a=(1,1,2) and

c=(4,4,0).

Then, a + c = (1+4, 1+4, 2+0)

= (5, 5, 2)

Now, projecting (a+c) onto c, we get,

projc(a+c) = [(a+c).c / |c|^2] c

= [(5×4 + 5×4) / (4^2 + 4^2)] (4,4,0)

= (4,4,0.5)

Therefore, [(a+c) - projc(a+c)] = (5,5,2) - (4,4,0.5)

= (1,1,1.5)

Therefore, the vector component of a + c orthogonal to c is (1,1,1.5).

Conclusion: The value of k is 1, the volume of the parallelepiped is 12 + 4λ, and the vector component of a + c orthogonal to c is (1,1,1.5).

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In​ randomized, double-blind clinical trials of a new​ vaccine, rats were randomly divided into two groups. Subjects in group 1 received the new vaccine while subjects in group 2 received a control vaccine. After the second​ dose, 104 of 669 subjects in the experimental group​ (group 1) experienced drowsiness as a side effect. After the second​ dose, 61 of 550 of the subjects in the control group​ (group 2) experienced drowsiness as a side effect. Does the evidence suggest that a higher proportion of subjects in group 1 experienced drowsiness as a side effect than subjects in group 2 at the α=0.10 level of​ significance?

Answers

The p-value associated with a z-score of 3.09 to be approximately 0.001.

To determine if the evidence suggests that a higher proportion of subjects in group 1 experienced drowsiness as a side effect than subjects in group 2 at the α=0.10 level of significance, we need to conduct a hypothesis test.

Let p1 be the proportion of subjects in group 1 who experience drowsiness and p2 be the proportion of subjects in group 2 who experience drowsiness.

Our null hypothesis is that there is no difference in the proportion of subjects who experience drowsiness between the two groups. This can be written as:

H0: p1 = p2

Our alternative hypothesis is that the proportion of subjects who experience drowsiness is higher in group 1 than in group 2. This can be written as:

Ha: p1 > p2

We will use a significance level of α=0.10.

To conduct the hypothesis test, we need to calculate the test statistic and p-value. The test statistic is given by:

z = (p1 - p2) / sqrt(pooled proportion * (1 - pooled proportion) * (1/n1 + 1/n2))

where pooled proportion is the proportion of subjects who experience drowsiness in both groups combined, and n1 and n2 are the sample sizes for groups 1 and 2, respectively.

The pooled proportion can be calculated as:

pooled proportion = (x1 + x2) / (n1 + n2)

where x1 and x2 are the number of subjects who experience drowsiness in groups 1 and 2, respectively.

Plugging in the values from the question, we get:

pooled proportion = (104 + 61) / (669 + 550) = 0.124

z = (0.154 - 0.111) / sqrt(0.124 * 0.876 * (1/669 + 1/550)) = 3.09

Using a standard normal distribution table or calculator, we can find the p-value associated with a z-score of 3.09 to be approximately 0.001.

Since the p-value is less than the significance level of α=0.10, we reject the null hypothesis and conclude that there is evidence to suggest that a higher proportion of subjects in group 1 experienced drowsiness as a side effect than subjects in group 2 at the α=0.10 level of significance.

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what is 15x - 35x + 10 + 6

Answers

Answer:

-20x+16 that is the answer

Step-by-step explanation:

Answer:

-20x +16

Step-by-step explanation:

As an equation because you cannot add a constant with a whole number so there is no one answer to you equation. How you can solve is you only need to add combine like terms and the 35 is a negative and not 15 minus 35 but 15x + (-35x). I hope this helps mate ;).

Ruth’s credit card has an apr of 10.91%, and it computes finance charges using the previous balance method on a 30-day billing cycle. during the april billing cycle, she made a $45.17 payment on april 10th and a $88.34 purchase on april 17th. her total at the start of may was $847.64. what was her balance at the beginning of april? a. $890.91 b. $797.22 c. $796.87 d. $804.47

Answers

Based on the balance at the start of May and the purchases and payments made by Ruth, the balance at the beginning of April was b. $797.22.

What was the beginning balance in April?

First find the monthly rate:

= 10.91% / 12

= 0.909%

The beginning balance is x:

May balance = (Beginning balance x (1 + monthy rate) + Purchases - Payments

847.64 = x × 1.00909 + 88.34 - 45.17

1.00909x = 847.64 - 88.34 + 45.17

x = $797.22

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Answer:

B on edge

Step-by-step explanation:

with a reserve requirement of 5% and an initial deposit of $400, what is the maximum total amount of money that will be in the money supply? assume that all currency is deposited in a bank 7 banks hold no excess reserves (rr=.05)

Answers

The maximum money supply with a 5% reserve requirement and a $400 initial deposit is $8,000.

How to find  maximum money?

To calculate the maximum total amount of money that will be in the money supply, we need to consider the money multiplier effect based on the reserve requirement.

The money multiplier is given by the formula: MM = 1 / reserve requirement.

Given that the reserve requirement is 5% (rr = 0.05), the money multiplier is MM = 1 / 0.05 = 20.

The initial deposit is $400.

To calculate the maximum total amount of money in the money supply, we multiply the initial deposit by the money multiplier:

Maximum Money Supply = Initial Deposit * Money Multiplier

= $400 * 20

= $8,000.

Therefore, the maximum total amount of money that will be in the money supply is $8,000 when the reserve requirement is 5% and all currency is deposited in banks with no excess reserves.

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Deirdre kept track of how long it took her to drive home from work each day for several
weeks. The box plot represents the data she collected. Which of these statements must
be true about the data?
Deirdre's Drive Home
H + + + + + +
20 22 24 26 28 30 32 34 36 38 40
Time (minutes)
Deirdre's drive home took 28 minutes or less on half the days.
The mean amount of time it took Deirdre to drive home was 28 minutes.
The range of the different amounts of time it took Deidre to drive home was 40 minutes.
Deirdre's drive home took between 26 and 32 minutes on only one-quarter of the days.

Deirdre kept track of how long it took her to drive home from work each day for severalweeks. The box

Answers

Answer:

Deirdre's drive home took 28 minutes or less on half the days.

Option 1 is correct.

Deirdre's drive home took 28 minutes or less on half the days.

What is mean?

"The mean is the mathematical average of a set of two or more numbers. The arithmetic mean and the geometric mean are two types of mean that can be calculated."

What is median?

"The median is the middle number in a sorted, ascending or descending, list of numbers and can be more descriptive of that data set than the average."

Explanation for other options:

Option 2:

28 is the median time but not the mean time

So, option 2 is correct.(Median = \(Q_{2}\) = 28)

Option 3:

Range = 40 - 22 = 18.

So, incorrect option.

Option 4:

75% - 25% = 50%

So, incorrect option

Explanation for correct option:

Option 1:

Deirdre's drive home took 28 minutes or less on half the days.

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2x^4 + 22x^3 + 56x^2

Answers

Answer:

2x^2(x + 4)(x + 7)

Step-by-step explanation:

Factor the polynomial

Please give me Brainliest

this equation
Approximately 4 people out of every 40 people
are left-handed. About how many left-handed
people would you expect to have in a group of
240 people?

Answers

Answer:40

Step-by-step explanation:

40 beacause you have to round to the nearset 10

What is the distance between the two endpoints in the graph below? If
necessary, round your answer to two decimal places.
(3,5)
O A. 13.46 units
B. 11 units
C. 10 units
66,-6)
D. 14.21 units

What is the distance between the two endpoints in the graph below? Ifnecessary, round your answer to

Answers

C because it’s rounding to the 11

Answer:

14.21

Step-by-step explanation:

It's actually 14.21 on A p E x

Which relation below is a function?

PLEASE I Need help

Which relation below is a function?PLEASE I Need help

Answers

Answer:

B

Step-by-step explanation:

If each input value leads to only one output value, classify the relationship as a function. If any input value leads to two or more outputs do not classify the relationship as a function.

Answer:

D is Function and A, B and C are Non-Function

Step-by-step explanation:

If we looked at A, B and C we will see that X has the same values.

Rules: Function should always have different X values.

During part of a song, the drummer in a marching band moves from (1, 4) to (5, 1). Write the component form of the vector that describes his movement.

Answers

The component form of the vector that describes the drummer's movement is <4, -3>.

The component form of a vector is given by the difference between the coordinates of the endpoints.

The initial point is (1, 4) and the final point is (5, 1).

Thus, the horizontal component is the difference between the x-coordinates, which is 5 - 1 = 4,

and the vertical component is the difference between the y-coordinates, which is 1 - 4 = -3.

Therefore, the component form of the vector that describes the drummer's movement is <4, -3>.

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(4) Determine whether the set of all bounded real functions forms a vector space with the usual function addition and scalar multiplication

Answers

The set of all bounded real functions does not form a vector space with the usual function addition and scalar multiplication.

To determine if a set of objects forms a vector space, we need to check if it satisfies the vector space axioms. These axioms include properties such as closure under addition and scalar multiplication, existence of additive identity and inverses, and distributive properties.

In the case of the set of all bounded real functions, it does not satisfy the closure property under scalar multiplication. To demonstrate this, consider a bounded real function f(x) that is bounded by M, and let c be a scalar.

When we multiply the function f(x) by a scalar c, the resulting function cf(x) may not remain bounded. If c is non-zero and large enough, cf(x) can exceed any bound M, violating the condition of boundedness.

For example, consider the bounded function f(x) = 1, which is bounded by M = 1. If we multiply this function by a scalar c = 2, the resulting function cf(x) = 2 is unbounded and violates the condition of boundedness.

Since the set of all bounded real functions fails to satisfy the closure property under scalar multiplication, it does not form a vector space with the usual function addition and scalar multiplication.

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1. HL

2. ASA

3. SSS

4. SAS

1. HL2. ASA3. SSS4. SAS

Answers

Answer:

Sorry but if there is no figure of triangle then we cannot say SAS, SSS, ASA, HL.

The correct answer is the SSS postulate.

In both triangles, there are three pairs of corresponding sides that are congruent. Therefore, If three sides of one triangle are congruent to three sides of another triangle, then the two triangles are congruent. All there sides in both triangles have congruent sides, so both triangles must be congruent.

On what day does frank first get charged an overdraft fee? a. wednesday b. thursday c. friday d. saturday

Answers

Frank first get charged an overdraft fee on Wednesday

Frank has $66.50 in his account as of Sunday.

He made a debit of $60.33 on Monday (66.50 - 60.33), leaving him with a balance of $6.17. He added $80.75 to the account on that same Monday (6.17 plus 80.75). He has $86.92 left over as of Monday.

Frank had a balance of $86.92 on Tuesday when he made a $54.45 debit (86.92 - 54.45). The remaining balance is $32.47.

Frank had a balance of $32.47 at the beginning of the day on Wednesday. He subsequently made withdraw of $49.20. debit(32.47 - 49.20). Frank has overdrawn and will be assessed an overdraft fee following the debit because his balance is -$16.73. Frank still has a negative balance even after making a deposit of $15.

Therefore, Frank was therefore assessed an overdraft fee on Wednesday.

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If you have a set of discrete data and are constructing a frequency table where the first class is 10-15 then the 3rd class will be: a. 30-35 b. 20-25 c. 21-26 d. 30-45 e. 22-27

Answers

If you have a set of discrete data and are constructing a frequency table where the first class is 10-15 then the 3rd class will be b. 20-25.

The correct answer is option b. 20-25.

When constructing a frequency table, the classes should have the same width and should not overlap. In this case, the first class is 10-15, which has a width of 5 (15-10=5). Therefore, the second class should have the same width and should not overlap with the first class.

The second class will be 16-20, and the third class will be 21-25. However, since the classes are inclusive on the lower end and exclusive on the upper end, the third class will be written as 20-25.

Therefore, the correct answer is option b. 20-25.

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______. a measurable part of a line that consists of two points, called endpoints, and all of the points between them.

Answers

Line segment is a a measurable part of a line that consists of two points, called endpoints.

What is coordinate Geometry?

a coordinate system is a system that uses one or more numbers, or coordinates, to uniquely determine the position of the points or other geometric elements on a manifold such as Euclidean space.

Given that measurable part of a line that consists of two points, called endpoints is a line segment.

A line segment is a part of a straight line that is bounded by two distinct end points, and contains every point on the line that is between its endpoints.

Hence, line segment is a a measurable part of a line that consists of two points, called endpoints.

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70 % of 90 please give all right answers this is the last question of this assignment and i dont want to fail

Answers

70% of 90=

10%= 90 divided by 10= 9

9*7=63

Pls help me on this equation

Pls help me on this equation

Answers

I think the answer is A

Does molar mass depend on pressure and temperature?

Answers

No, molar mass is a constant and does not depend on pressure or temperature.

Molar mass is a physical property of a substance and is the mass of one mole of a given substance. It is a constant value that represents the amount of grams of a substance that contains 022 x 1023 atoms or molecules. Since molar mass is a constant, it does not depend on pressure or temperature. Pressure and temperature can affect the physical and chemical properties of a substance, but they do not have an effect on the molar mass. The molar mass of a substance can be useful in determining molecular and empirical formulas, as well as calculating densities and molar concentrations.

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A woman bought 210 oranges for $6.50. She sold all of them at 3 for 20cents. How much profit did she make?

Answers

Divide total bought by 3 and multiply by 20cents:

210/3 = 70

70 x 0.20 = $14.00

Subtract the amount they paid by the amount they made:

14.00 - 6.50 = $7.50

The profit made was: $7.50

pls helppp!!! with geometry

pls helppp!!! with geometry

Answers

Answer:

x = 6

Step-by-step explanation:

In order for lines p and q to be parallel, angle 2 and angle 6 must be equal. This is because of the Corresponding Angles Theorem, which states that if a transversal cuts through two parallel lines (p and q in this case), the resulting corresponding angles will be congruent (and 2 and 6 are corresponding angles)

You know that:

angle 2 = (7x - 3)

angle 6 = (6x + 3)

As stated before, in order for p and q to be parallel, angles 2 and 6 must be congruent, so to find x you need to solve the following equation:

7x - 3 = 6x + 3

Now, you just need to simplify:

7x - 3 = 6x + 3

= x - 3 = 3

= x = 6

So x = 6.

6x + y = 9 3x -4y = -18

Answers

Answer:

x = 2/3

y = 5

Step-by-step explanation:

6x + y = 9

3x -4y = -18

Times the second equation by -2

6x + y = 9

-6x + 8y = 36

9y = 45

y = 5

Now put 5 in for y and solve for x

6x + 5 = 9

6x = 4

x = 2/3

Let's check

6(2/3) + 5 = 9

4 + 5 = 9

9 = 9

So, x = 2/3 and y = 5 is the correct answer.

Are -3/5 and -0.4 equal

Answers

\( \huge \boxed{\mathfrak{Question} \downarrow}\)

Are -3/5 and -0.4 equal ?

\( \large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}\)

Okay so, to solve this question we need to convert -3/5 to its decimal form.\( \large \sf - \frac{3}{5} = - 0.6 \\ \)We can see that - 3/5 is equal to - 0.6 which is not equal to -0.4.So, - 3/5 & - 0.4 are not equal.

Hey there!

Convert the fraction to decimals.

-3/5 = -0.6

-0.6 < -0.4

Hence, -3/5 is not equal to -0.4.

Answer = NO

Hope it helps ya!

Use the figure.

diameter is 10m

A circle has a diameter labeled ten meters.
Find the circumference. Round your answer to the nearest hundredth. Use 3.14 for π

Answers

Answer:

FOR ALL MY POINTS write an argumentative essay on why dog parks are "helpful or harmful"

READ PROMPT

Step-by-step explanation:

Answer:

Formula for the circumference of a circle =2pir

Since the diameter is 10m the radius is half of that which is 5m.

2×3.14×5=31.4m

Step-by-step explanation:

I hope this helps.Have a great day♡

Find the slope given the points (2, −7) and (−1,
6).

Answers

Answer:

The Slope= -13/3

y-intercept= (0,5/3)

Step-by-step explanation:

m= change in y/change in x

m= y2-y1/x2-x1

m=6-(-7)/ -1-(2)

m=-13/3

Please help!!
















I am giving you half of my points. Just say something as an answer!

Answers

Answer: i am so confused lol

Step-by-step explanation:

Answer:

Something

Step-by-step explanation:

First you type shift then s, o, m, e, t, h, i, n, and g


Yovani can do 8 math problems in 1 3/5 of a
minute. How many problems can he
complete per minute?

Answers

Answer:

5 Problems

Step-by-step explanation:

Based on the given conditions, formulate: \(8\) ÷ \(1\frac{3}{5}\)

Find common denominator and write the numerators above common denominator: \(\frac{8}{\frac{5}{5} +\frac{3}{5} }\)

Write the numerators over common denominator: \(\frac{8}{\frac{5+3}{3} }\)

Calculate the sum or difference: \(\frac{8}{\frac{8}{5} }\)

Divide a fraction by multiplying its reciprocal: 8 × \(\frac{5}{8}\)

Cross out the common factor: 5

get the result: 5  

Answer: 5

Other Questions
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