Simplify using trigonometric identities
2sinθ - sin2θ cosθ

Answers

Answer 1

Double angle identity for sine:

[tex]\sin(2x) = 2 \sin(x) \cos(x)[/tex]

[tex]\implies 2 \sin(\theta) - \sin(2\theta) \cos(\theta) = 2 \sin(\theta) - 2 \sin(\theta) \cos^2(\theta)[/tex]

Factorize the left side.

[tex]2 \sin(\theta) - 2 \sin(\theta) \cos^2(\theta) = 2 \sin(\theta) \left(1 - \cos^2(\theta)\right)[/tex]

Pythagorean identity:

[tex]\cos^2(x) + \sin^2(x) = 1[/tex]

[tex]\implies 2 \sin(\theta) \left(1 - \cos^2(\theta)\right) = 2 \sin^3(\theta)[/tex]

so that

[tex]\boxed{2 \sin(\theta) - \sin(2\theta) \cos(\theta) = 2 \sin^3(\theta)}[/tex]


Related Questions

Describe the transformation of the function, y=1/7 x from y = x.

Answers

The transformation of the function, y=1/7 x from y = x is y = 7x

How to determine the transformation?

The function is given as:

y = 1/7x

The transformation rule is given as:

y = x

This means that we swap x and y.

So, we have:

x = 1/7 y

Multiply through by 7

y = 7x

Hence, the transformation of the function, y=1/7 x from y = x is y = 7x

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When we graph a line using slope and y-intercept, the first point that you graph is
ALWAYS on_____, and you use _____ to get to the next point.

Answers

Answer:

y=mx+b is the formula starting with b say it is 4 you put a dot on 4  on the y axis m is 1/2 you go up 1 right 2 on the 4 points then do the same on the next point you get then you get your line. hope this helps  

20 people show up to the party and robert decides to give them

Answers

Answer:

This question looks and sounds like a "personal opinion question" to me.

so from my opinion Robert give them a Smack in their ases .

Hope this helps .

Good luck ✅.

Problem
A prime trio is a collection of three prime numbers [tex]\{p,q,r\}[/tex] in arithemtic progression, with common difference [tex]q-p=r-q[/tex]. For example, the prime trio [tex]\{3,5,7\}[/tex]has common difference 2.
(a) Find a prime trio with common difference 50.
(b) Find two prime trios with common difference 60.
(c) Prove that there is no prime trio with common difference 70.

Answers

Answer:

(a) 50:

3 53 103

(b) 60:

7 67 127

11 71 131

Step-by-step explanation:

OK, I think you can prove this with the theorem that any prime greater than 3 is 6n-1 or 6n+1, for integer n. In other words, any prime is near a multiple of 6; it is either one less or one more. The proof for this is very easy, look it up.

Given this fact, if two primes (p,q) are 70 a part, this means the first one has to be a case of 6n+1 and the second one has to be a case of 6n-1. Why? Because the nearest multiple of 6 is 72 and with +1 on one end and -1 on the other end, you can reach a "gap" of 70.

Now for the next two primes (q,r) the same must hold. Only, it can't because this requires q to be both 6n-1 and 6n+1.

The graph of f(x) was vertically translated down by a value of k to get the function g(x) = 5x + k. What is the value of k?

Answers

The value of k in g(x) = 5^x + k is -7

How to determine the value of k?

The complete question is added as attachment

The functions are given as:

f(x) = 5^x

g(x) = 5^x + k

From the attached graph, we can see that:

f(x) is shifted down by 7 units to form g(x)

This means that:

g(x)= f(x) - 7

This gives

g(x) = 5^x - 7

Substitute g(x) = 5^x - 7 in g(x) = 5^x + k

5^x + k = 5^x - 7

This gives

k = -7

Hence, the value of k in -7

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Work out the surface area of the triangular prism below. Give your answer in cm cm². 17 cm 14 cm 15 cm 8 cm​

Answers

Answer:

Step-by-step explanation:

A= 2AB+(a+b+c)h

AB= s (s﹣a) ( s﹣b) (s﹣c)

s = a+b+c

2

Solving for A

A= ah +bh+ch+1

2﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=17·8+14·8+15·8+1

2·﹣174+2·(17·14)2+2·(17·15)2﹣144+2·(14·15)2﹣154≈ 567.35897

Answer: 567.36

The formula = A = 1/2 bh

You can find the answer with that formula

Which expression is equivalent to (2x²y) ³?
O 2x¹y4
2x¹2y3
8x¹ y
O 8x¹2y³

Answers

Answer: [tex]8x^6 y^3[/tex]

Step-by-step explanation:

See attached image.

The expression which is equivalent to (2x²y)³ is 8x⁶y³

What is Expression?

An expression is combination of variables, numbers and operators.

The given expression is (2x²y)³

Two times of x square times of y whole to the power of three

We have to find the equivalent expression of the given expression.

Equivalent expressions are expressions that work the same even though they look different.

We have a property that [tex](a^m)^n=a^m^n[/tex]

So (2x²y)³ = 2³x⁶y³

=8x⁶y³

Hence, the expression which is equivalent to (2x²y)³ is 8x⁶y³

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Type the correct answer in the box.
The formula for the volume, V, of a cone having the radius, r, and the height, h, is shown below.
V = r²h
Write the formula to calculate the height, h.

Answers

Answer:

Cone: h =  [tex]3\frac{V}{\pi r^{2} }[/tex]

Cylinder: h = [tex]\frac{V}{\pi r^{2} }[/tex]

Step-by-step explanation:

- the formula you described is not the formula for the volume of a cone as it is V = [tex]\pi rx^{2} \frac{h}{3}[/tex]

- to find the height you simply rearrange the formula, so the formula to calculate the height of the cone is:

- h =  [tex]3\frac{V}{\pi r^{2} }[/tex]

- based on the formula you described, it is closer to a cylinder and the formula for the volume of a cylinder is: V = [tex]\pi r^{2} h[/tex]

- once again, to find the height you simply rearrange the formula, so the formula to calculate the height of the cone is:

- h = [tex]\frac{V}{\pi r^{2} }[/tex]

hope this helps :)

At a restaurant levys total bill is 46 bucks, if he wants to tip 15 percent how much should he leave as a tip?

Answers

Total bill is 46
Wants to tip 15%
There; 15/100 * 46/1 = 6.9

sari ran for class president. each student in her class voted one time. sari won 25% of the student votes. if sari recived 60 votes, how many students voted altogether

Answers

The number of students who voted is 240.

How many students voted?

Percentage can be described as a fraction out of an amount that is usually expressed as a number out of hundred.

The number of students who voted = number of votes Sari received / percentage number

60 / 0.25 = 240

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X. y.
-1. 1/10
0. 1/2
1. 5/2
2. 25/2
3. 125/2



What is the rate of change of the function described in the table?
a. 12/5
b. 5
c. 25/2
d. 25​

Answers

Answer: B

Step-by-step explanation:

Each time x increases by 1, y is multiplied by 5.

does 6(2x-6)=-7(-2x+4) have no solution or infinite solution

Answers

Answer:

It does not.

Step-by-step explanation:

[tex]6(2x - 6) = -7(-2x + 4); \\ 6 * 2x - 6 * 6 = -7 * (-2x) + (-7) * 4; \\ 12x - 36 = 14x - 28; \\ 14x - 12x = -36 + 28; \\ 2x = -8; \\ x = -4.[/tex]

[tex]\{-4\}[/tex] is our set of solutions. Answering your question, it does not.

What is the equation of the function represented by this graph?

Answers

Answer:

[tex]\displaystyle g(x) = -(x + 2)(x - 4)[/tex]

Step-by-step explanation:

First, look at the graph to determine whether it opens down or up, which in this case is down, so you insert a negative in front of the expression. Next, locate your x-intercepts [zeros (where the graph insects the x-axis)]. You will see that the graph intersects [tex]\displaystyle [-2, 0][/tex] and [tex]\displaystyle [4, 0],[/tex] so what you do is insert the zeros' OPPOCITES into the equation because according to the vertex equation, [tex]\displaystyle y = A[x - h]^2 + k,[/tex] that negative in front of [tex]\displaystyle h[/tex] gives you the OPPOCITE outcome, so be careful.

I am joyous to assist you at any time.

Please help me....trying to get my HS diploma, i did not graduate :(

Kevin wants to buy an area rug for his living room. He would like the area rug to be no smaller that 48 square feet and no bigger than 80 square feet. If the length is 2 feet more than the width, what are the range of possible values for the length?

Answers

Answer:

It would be B.

Step-by-step explanation:

[tex]area = l \times w \\ but \: w = l - 2[/tex]

[tex]area = l(l - 2) = l {}^{2} - 2l[/tex]

[tex]l {}^{2} - 2l \geqslant 48 \\ l {}^{2} - 2l - 48 \geqslant 0 \\ (l + 6)(l - 8) \geqslant 0[/tex]

[tex]l {}^{2} - 2l \leqslant 80 \\ l {}^{2} - 2l - 80 \leqslant 0 \\ (l + 8)(l - 10) \leqslant 0[/tex]

Sol 1: L in ]-∞,-6]U[8,∞[Sol 2: L in [-8,10]

Intersection:L belongs [-8,-6[U[8,10]

But Length cannot be negative

L belongs [8,10] or 8≤L≤10

Silva the formula I=Prt, in general, to find the principal, p.

Answers

Dividing both sides by rt,

[tex]\boxed{P=\frac{I}{rt}}[/tex]


You are planning a trip to Bermuda but have heard stories of people getting "lost" in the area that forms what is known as the Bermuda Triangle. You are
curious just how big the area that forms the triangle actually is and decide to investigate. You discover that one side length of the triangle is 900 miles and
another sides is 930 miles and the angle between them is 56 degrees. What is the area that the plane can fly and be in the zone known as the Bermuda
Triangle? Round your answer to the nearest mile.

Answers

The area that the plane can fly and be in the zone known as the Bermuda is; 346952 mile²

How to use the area rule to find the area of a triangle?

The area rule states that the area of any triangle is equal to half the product of the lengths of the two sides of the triangle multiplied by the sine of the angle included by the two sides.

Now, from the question, we are give;

Side 1 = 900 miles

Side 2 = 930 miles

Angle between two sides = 56°.

Thus, by the area rule we have;

Area = (1/2) * 900 * 930 * sin 56°

Area = 346952 mile²

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Two friends, Olivia and Melanie, took summer jobs. The equation y=22.2xy=22.2x represents Melanie's earnings in dollars and cents, yy, for working xx hours. Olivia earned $1156 in 40 hours. How much less per hour does Melanie earn than Olivia?

Answers

Answer:

  $6.70 per hour

Step-by-step explanation:

We want to compare the pay for 1 hour's work.

Melanie's pay

The equation tells us that her pay for working 1 hour can be found from the equation using x=1.

  y = 22.2x

  y = 22.2×1 = 22.2 . . . . pay for 1 hour

Melanie earns $22.20 per hour.

Olivia's pay

We assume that Olivia's pay is proportional to hours worked, so pay for 40 hours will be 40 times 1 hour's pay.

  pay per hour = $1156/(40 h) = $28.90/h

Olivia earns $28.90 per hour.

Pay difference

The difference in their rates of pay is ...

  $28.90 -22.20 = $6.70

Melanie earns $6.70 less per hour than Olivia.

Dr. Dominic Estores has written a prescription for a patient to take a preoperative medication at 2200 on the evening before his scheduled surgery. Using the standard time system, what time should you tell the patient to take his medication?

Answers

Using the conversion from the 24-hour system to the AM/PM system, the patient should take the medicine at 10 PM.

How to convert from 24 hours to AM/PM?

If the hour is between 0 and 11:59, the hour is kept with AM.If the hour is 12, it is PM.If the hour is between 13 and 23:59, the hour the remainder of the division of the hour and 12, PM.

22 divided by 12 has remainder 10, hence 22 is equivalent to 10 PM.

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what mixed number is equivalent to the fraction 28/5

Answers

The mixed number equivalent to the fraction 28 / 5 is 5 3 / 5

What is mixed fraction?

A fraction represented with its quotient and remainder is a mixed fraction.

Therefore, it is a combination of a whole number and a proper fraction.

Hence,

The fraction is in improper fraction, let's convert it to mixed fraction.

Therefore,

28 / 5 = 5 3 / 5

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0. In 1996 Jabu decides to invest in the Stock Exchange. He buys 1200 shares in a company at R6.75 per share. How much did he pay for the shares?​

Answers

Answer:

[tex]1200\times6.75=R8100[/tex]

The ages of 30 students in a class are given below. Construct a frequency table for grouped data using 6 classes. For convenience, the data has been ordered from smallest to largest. 15, 17, 18, 19, 25, 25, 27, 28, 29, 30, 30, 32, 33, 36, 38, 45, 45, 48, 49, 50, 52, 53, 55, 56, 57, 58, 59, 59, 63, 68 All responses should be whole numbers. Provide your answer below:

Answers

Here is the frequency table:
Class       Frequency

15 - 24       4

25 - 34        9

35 - 44       2

45 - 54        7

55 - 64         7

65 - 74          1

What is the frequency table?

A frequency table is used to track the frequency of a data set. The data ranges from 15 to 68, if the classes are to be 6, then the class interval would have to be 9.

Class       Frequency

15 - 24       4

25 - 34        9

35 - 44       2

45 - 54        7

55 - 64         7

65 - 74          1

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ANSWERS QUCIK PLS AND THINK U

Answers

Answer:

50.3cm²

Step-by-step explanation:

Formula: The area of a circle is found by A = πr²

Given:

radius is 4cmπ = 3.142

Plug in:

A = πr² → A = (3.142)(4)²

            → A = (3.142)(16)

            → A = 50.272

"1 decimal places",  round up to 50.3

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gym help

when doing any weighted exercises that involve using all or little of my body weight do i count my body weight and the added weight as my “actual weight lifted”? for example i weigh 150lbs and let’s say i did a single rep of weighted overhand chin ups with a single 20lbs weight wrapped around me and i wanted to track how much “actual weight” i just lifted would i write down and track just the 20lbs or my body weight 150lbs plus the weight 20lbs?

Answers

You should write down and track only the 20lbs weight during your weighted exercise while ignoring your body weight.

What is actual weight?

Actual weight is also referred to as gross weight and it can be defined as the exact (original) weight of an object, as measured using an appropriate weighing scale.

This ultimately implies that, you would write down and track only the 20lbs weight during your weighted exercise such as a single rep of weighted overhand chin ups.

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The auto parts department of an automotive dealership sends out a mean of 4.2 special orders daily. What is the probability that, for any day, the number of special orders sent out will be exactly 3? Round your answer to four decimal places.

Answers

The probability that, for any day, the number of special orders sent out will be exactly 3 is 0.1633.

What are some of the properties of Poisson distribution?

The Poisson distribution is a discrete probability distribution that describes the likelihood of a specific number of events occurring in a specified span of time or space, if these events occur at a constant mean rate and regardless of the time since the last occurrence.

Let X ~ Pois(λ)

Then we have:

E(X) = λ = Var(X)

Since standard deviation is the square root (positive) of variance,

Thus,

The standard deviation of X = [tex]\sqrt{\lambda}[/tex]

Its probability function is given by

[tex]f(k; λ) = Pr(X = k) = \dfrac{\lambda^{k}e^{-\lambda}}{k!}[/tex]

Given the mean is 4.2.

We have to find the probability that on any day, the number of special orders sent out will be exactly 3. Therefore, the value of x will be 5.

Using the Poisson distribution,

[tex]P(x) = \dfrac{e^{-\lambda}\lambda ^x}{x!}\\\\P(5) =\dfrac{e^{-4.2}(4.2)^5}{5!}\\\\P(5) = 0.1633[/tex]

Hence, the probability that, for any day, the number of special orders sent out will be exactly 3 is 0.1633.

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Find the missing value of the ordered triple that will make the solution to the equation x + 2y – 3z = 8 true.

7. (4, , 0)

8. ( , -2, -2)

9. (2, 3, )

10. (-3, -2, )

Answers

The missing value of the ordered triple for questions 7,8,9 and 10 will be  y=2,x=6,z=0, and z=-5 respectively.

What is the equation?

A mathematical statement consisting of an equal symbol between two algebraic expressions with the same value is known as an equation.

The given equation in the problem is;

7) (4, ,0)

Substitute the values in the equation;

⇒x+2y-3z = 8,

⇒4+2y-3(0) = 8

⇒2y=8-4

⇒2y=4,

⇒y=4/2

⇒y=2

8) (, -2, -2)

Substitute the values in the equation;

   

x+2(-2) -3(-2)= 8

x-4+6 =8

x= 8-6+4

x=8-6+4

x=6

9)(2, 3, )

Substitute the values in the equation;

⇒2+2(3)-3z = 8

⇒8-3z = 8

⇒-3z = 0

⇒z = 0/-3

⇒z= 0

10) (-3, -2, )

Substitute the values in the equation;

   

⇒-3+2(-2) -3z = 8

⇒-7 -3z = 8

⇒-3z = 15

⇒z = 15/-3

⇒z = -5

Hence, the missing value of the ordered triple for questions  7,8,9, and 10 will be  y=2,x=6,z=0, and z=-5 respectively.

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Which statements are true? Select three options.

You can use for reference ;)

Answers

The answers are A,C,&E

A coach in a train can seat exactly 72 people for a trip. The train has 12 such coaches. If the train made 156 trips in full capacity this year, how many people has it carried in that time. I will give brain to the first person who answers this question correctly.

Answers

Answer:

134,784 people

Step-by-step explanation:

Hello!

Let's first find the number of people it can carry on 1 trip. We can do this by multiplying the number of people per coach, by the number of coaches.

72 x 12864

The train carries 864 people per trip. We can find the number of people in 156 trips by multiplying 864 by 156.

864 x 156134,784

The train, in full capacity, will carry 134,784 people in 156 trips.

(a) The coefficient of variation for males is _%
(b) The coefficient of variation for females is _%


(c) Compare the variability of grade point averages of males and females. Choose the correct answer below.
A.
The grade point averages of females and males have the same variation.
B.
The grade point averages of females and males do not vary.
C.
The grade point averages of males are more variable than females.
D.
The grade point averages of females are more variable than males.

Answers

The coefficients of variation shows that D. The grade point averages of females are more variable than males.

How to illustrate the information?

From the complete information, the coefficients of variation for male is 21.3% and the coefficient of variation for female is 25.1%.

In this case, the coefficients of variation shows that the grade point averages of females are more variable than males.

In conclusion, the correct option is D.

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Find the angle between the vectors A = <2,-3> asnd B = <-2, -5> to the nearest tenth of a degree.

Answers

Answer:

55.5

Step-by-step explanation:

answer is 55.491477012331599 which rounded to the nearest tenth is 55.5

when you said to the nearest tenth of degree i assume that meant like rounding to the nearest tenth

how would i explain my students proportional reasoning

Answers

Answer:

proportional reasoning involved thinking about relationship and making comparisons of countries are values in the words of John went Diwali portion reasoning is difficulty find it is not something that you can or not to but is diploma over 3 reasoning

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