Question
the value of 2 cos x - cos 3x - cos 5x is
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Trigonometry is the branch of mathematics that deals with particular angles' functions and how to use those functions in calculations. There are six popular trigonometric functions for an angle. Sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant are their respective names and acronyms (csc).

Given:

sin x= 12/ 13

So, B = √13² - 12² = √169 - 144 = √25 = 5

cos x= -5/ 13

So, sin 2x= 2 sin x cos x =2 (12/13)(-5/13) = -120/169

and, cos 2x= 1- 2 sin²x

                  = 1- 2( 144 / 169)

                  = -119/ 169

and, tan 2x = sin 2x/ cos 2x = 120/ 169 / (- 119/ 169)= 120/ 119

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Answer:

24

Step-by-step explanation:

60% of 40 is 24 because to find a percentage, multiply the percent you are trying to find (60%) by the number you are trying to find percent of (40) and divide the answer of 60x40 by 100.  60x40 is 2,400. 2,400 divided by 100 is 24. The width of the rectangle is 24ft

Answer:

A Hooe that helps. Brainliest

The missing terms are 34t and 0.

Finding the solution to linear equations in one, two, three, or more variables is referred to as solving a linear equation. In simple words, finding the values that satisfy a Linear equation.

Here we have

Equation 3(18t +1) = 20t +3  

Let's solve the given expression to get the missing step

=> 3(18t +1) = 20t +3

Multiply (18t + 1) by 3

=> 54t + 3 = 20t + 3

Subtract 3 from both sides

=> 54t + 3 - 3 = 20t + 3 - 3

=> 54t = 20t

Subtract 20t from both sides  

=> 54t - 20t = 20t - 20t    

=>  34t = 0

Divide by 34 into both sides

=> 34t/34 = 0/34  

=>  t = 0  

Therefore,

The missing terms are 34t and 0.

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Answer:

Below

Step-by-step explanation:

a) they won 120 games out of 369 played  = 40/23=.325

b) they lost 248 out of 369 played = 248/369 = .672

c) Home games are 185 out of 369 = .501

d ) at home they won 72 out of (72+112+1) = 72/ 185 = .389

Let f:X→Ybe a function. Then the function  f  is a bijection if the relation   {(y ,x)∈Y×X∣ (x ,y)∈f}  is a function.  

Assume that X→Y is a bijective function.  

i.e. f:X→Y is one-one and onto function.

so different elements in X have different images in Y

and b ∈ Y there exists a ∈ X such that f(a)=b.

R= {(y ,x)∈Y×X∣(x ,y)∈f}  is a relation

we wish to prove R is a function.

R is a relation from Y to X  

let  Y∈Y by assumption f is bijection function from X to Y

for all y ∈ Y there exists X∈ X   such that f(x)=y.

so for every element in Y there is mapping element in X.
if (x ,y) ∈  f then (y ,x) ∈ R

therefore R is a function.        

   

let X1, X2, ∈ X then there exists some y1, y2,∈ y such that

take f ( x1 )= y1 and f( x2)=y2

by assumption R is a function from Y to X that is inverse of f is existing means f is bijection.

for bijective functions only inverse exists.

If f:X→Y is a function. Then the function f is a bijection if the relation

{(y ,x)∈Y×X∣(x, y)∈f}  is a function.

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Answer:

  HAEC

Step-by-step explanation:

You want the code letters associated with lines 1–4 on the graph.

Has a y-intercept of -4, and a rise/run if 1/4. The equation is ...

  y = 1/4x -4  (H)

Has a y-intercept of -4, and a rise/run of 4/1 = 4. The equation is ...

  y = 4x -4  (A)

Has a y-intercept of 3, and a rise/run of -2/1 = -2. The equation is ...

  y = -2x +3  (E)

Has a y-intercept of +1 and a rise/run of 2/1 = 2. The equation is ...

   y = 2x +1  (C)

The code is HAEC.

The time required to match the record is 41.37 seconds. The correct option is (c).

The arithmetic operations are the fundamentals of all mathematical operations. The example of these operators are addition, subtraction, multiplication and division.

The given problem can be solved as follows,

The remaining time for matching the record is given by,

73.4 - (20(¹/₄) + 11.78)

= 73.4 - (81/4 + 11.78)

= 73.4 - (20.25 + 11.78)

= 73.4 - 32.03

= 41.37

Hence, the time Julie have left to match the record is 41.37.

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Rounded to 5 decimal places, the initial mass of the sample was 48.00000 mg, and the mass 7 weeks after the start was 0.00002 mg.

What is the half-life of a substance?

Half-life is the time required for the amount of something to fall to half its initial value. The converse of half-life is doubling time.

The half-life of a substance is the time it takes for half of the initial mass of the substance to decay.

Since the half-life of Palladium-100 is 4 days, after 4 days, the mass of the sample will be reduced to half of its initial value. After 8 days, it will be reduced to a quarter of its initial value, and after 12 days it will be reduced to an eighth of its initial value.

We are given that after 12 days, the mass of the sample is 6 mg. This means that the initial mass of the sample was 8 * 6 mg = 48 mg.

After 7 weeks (7 * 7 = 49 days), the mass of the sample will be reduced by a factor of

              =  [tex]8^{(49/4) }[/tex]

             = [tex]8^{12.5}[/tex] =

approximately [tex]2.6 * 10^6[/tex]. The mass of the sample after 7 weeks will be approximately [tex]\frac{6 mg }{2.6 * 10^6}[/tex] = approximately [tex]2.3 * 10^{-6}[/tex] mg.

Rounded to 5 decimal places, the initial mass of the sample was 48.00000 mg, and the mass 7 weeks after the start was 0.00002 mg.

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The range of possible values for x is 0<x<20

The Range is the difference between the lowest and highest values.

In any triangle, the smallest angle is opposite to the smallest side.

So, In ΔABD , the side which faces ∠ABD is AD whose length is 32 units.....(1)

And, in ΔCBD, the side which faces ∠CBD is CD whose length is 20 units....(2)

Now, from equations (1) and (2) We get,

∠ABD < ∠CBD

So, ∠ABD lies between 0° to 48°

0<4x+8<48

Subtract 8 on both sides

-8<4x<40

Divide by 4

-2<x<10

As ∠ABD lies between 0° to 48°, so 0<x<10 is the range.

Hence, 0<x<10 is the range of possible values for x.

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Answer: 8 weeks

Step-by-step explanation: It would take John 8 weeks to collect more basketball cards than Frank with 67 cards for John and 66 for Frank.

Answer: 18

Step-by-step explanation:

[tex]\triangle HJK \cong \triangle HLK[/tex] by HL. Therefore, [tex]JK=2[/tex] by CPCTC.

Using the segment addition postulate, [tex]GK=9[/tex].

Furthermore, [tex]\triangle HGK \cong \triangle HMK[/tex] by HL. This means that [tex]MK=9[/tex] by CPCTC.

Using the segment addition postulate again, [tex]GM=9+9=18[/tex].

The probability that the marble is red or blue is 0.6923 or 69.23% if the bag contains five red marbles, four blue marbles, and four yellow marbles. You randomly pick a marble.

It is defined as the ratio of the number of favorable outcomes to the total number of outcomes, in other words the probability is the number that shows the happening of the event.

We have the total number of marbles = 5+4+4 =13

Total number of red and blue marble = 5+4 = 9

The probability that the marble is red or blue = 9/13 = 0.6923 or

= 69.23%

Thus, the probability that the marble is red or blue is 0.6923 or 69.23% if the bag contains five red marbles, four blue marbles, and four yellow marbles. You randomly pick a marble.

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Answer:

66% and 2/3

Step-by-step explanation:

100% divided by 3 is 33% and 1/3

Hope that helps! :)

Answer:

Step-by-step explanation:

115 woman

Step-by-step explanation:

4_/12=4_/3*4=4*2_/3=8_/3

5_/3+8_/3=13_/3

The result is irrational number because it cannot be written as the ratio of two integers. and its decimal extention is neither terminating nor repeting.

Hello,

I hope you and your family are doing well!

To solve for V, we can start by subtracting 13 from both sides of the equation:

|v-8| = 16

Since the absolute value of a number is always nonnegative, we know that the value inside the absolute value must be either positive or zero. This means that we have two possible cases to consider:

Case 1: v-8 > 0

In this case, we can drop the absolute value symbols and solve the equation:

v-8 = 16

v = 24

Case 2: v-8 = 0

In this case, we can drop the absolute value symbols and solve the equation:

v-8 = 0

v = 8

So the possible values of V are 8 and 24.

-----

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Happy Holidays!

Step-by-step explanation:

|v-8| + 13 = 29

subtract 13 from both sides

|v-8| = 16

form two equations:

v-8 = 16 -(v-8) = 16

v-8 = 16

add 8 to both sides

v = 24

-(v-8) = 16

-v+8 = 16

subtract 8 from both sides

-v = 8

divide both sides by a -1

v = -8

check work:

|v-8| + 13 = 29

|24-8| + 13 = 29

|16| + 13 = 29

29 = 29

|v-8| + 13 = 29

|-8-8| + 13 = 29

|-16| + 13 = 29

|-29| = 29

29 = 29

The changes to the slope and y-intercept of this transformation are

From the question, we have the following parameters that can be used in our computation:

g(a) = f(a) + k

Also, from the question, we have

k = 2

Using the above as a guide, we have the following:

Substitute the known values in the above equation, so, we have the following representation

g(a) = f(a) + 2

This means that

Slope of f(a) = Slope of g(a)

Also, we have

y-intercept of g(a) = y-intercept of f(a) + 2

Hence, the y-intercept of g(a) is 2 greater than the y-intercept of f(a)

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Therefore by solving the equations we get to know that 196 children and  200 adults were present on that day.

equation, a declaration of equivalence between two expressions with variable- and/or number-filled expressions. In essence, equations are questions, and efforts to discover a method for answering them have fueled the growth of mathematics. Equations range in complexity from straightforward addition-and-multiplication equations in mathematics through differential equations, exponential equations that use exponential expressions, and integral equations.

Let's initially configure our system by giving the letters x and y meanings. Assume x is the number of kids and y is the number of adults.

Children are priced at $1.50, while adults are priced at $4.00. We multiply the total number of children, x, by 1.5 to get how much each child will cost. 1.5x is used to indicate this. We will use 4y for adults, whose entry fee is $4. On the specified day, $1094 in total revenue was earned. This sum requires the addition of 1.5x and 4y.

1.5x + 4y = 1094 works for the money equation involved.

Second equation: The total number of individuals present on the day is 283. X and Y, or the number of children and adults, must be added together to arrive at this figure.

x + y = 396

System of equations:

1.5x + 4y = 1094

x +   y = 396

Thus,

x + y = 396  

y = 396- x

Substitute y = 396 - x into the first equation.

1.5x + 4 (396 - x) = 1094

1.5x + 1584 - 4x = 1094  

1584 - 2.5x = 1094      

-2.5x = -490                  

x = 196

Substitute x =196 back into y = 396 - x

y = 396 - 196 = 200

Therefore by solving the equations we get to know that 196 children and  200 adults were present on that day.

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Answer: The diameter of a pizza is 20 inches.

55 I think if I'm wrong sorry

Step-by-step explanation:

This is a Taylor series because our center is non-zero.

The goal of Taylor series is to approximate non polynomial functions using Calculus.

So let's be intuitive.

In order to be accurate, we need to match the center value at some center a.

We know that cos(pi/2)=0, so our first constant should be 0.

[tex]q(x) = 0[/tex]

Next, we must be spot on with the linear approximation

at x=pi/2

we know that

[tex] \frac{d}{dx} \cos(x) = - \sin(x) = - \sin( \frac{\pi}{2} ) = - 1[/tex]

We also want to divide this by 1! , which is just one so our constant there is

-1, since we want to use this as an linear approximation and we want to be general, and we have a center to stay in respect to,

our next term is

[tex] 0 - 1(x - \frac{\pi}{2} ) {}^{1} [/tex]

Next, up, we must be similar in concavity.

So we take the second derivative of cosine which is just

[tex] - \cos(x) = - \cos( \frac{\pi}{2} ) = 0[/tex]

Since our constant is 0, we can skip this, even if we divide by 2!

Our fourth term is the third derivative of cosine

which is

[tex] \sin(x) = \sin( \frac{\pi}{2} ) = 1[/tex]

We then divide that by 3!, which becomes

[tex] \frac{1}{6} [/tex]

since we want to use this as an cubic approximation and we want to be general, and we have a center to stay in respect to,

our next term is

[tex] - (x - \frac{\pi}{2} ) {}^{} + \frac{1}{6} (x - \frac{\pi}{2} ) {}^{3} [/tex]

Let do one more term,

we know the 5th term is the fourth derivative of cosine evaluated at x=pi/2, which is just 0 so we can skip it.

The 6th term is the fifth derivative of cosine evaluated at x=pi/2, which is -1, then we divide by 5!, so we get

[tex]q(x) = - (x - \frac{\pi}{2} ) + \frac{1}{6} (x - \frac{\pi}{2} ) {}^{3} - \frac{1}{120} ( x - \frac{\pi}{2} ) {}^{5} [/tex]

Using the approximations, plug in 1.5 for x and we get approximately

0.0707

The true statement is The value of g(1) is 3 .

In mathematics, a function is represented as a rule that produces a distinct result for each input x. In mathematics, a function is indicated by a mapping or transformation. Typically, these functions are identified by letters like f, g, and h. The collection of all the values that the function may input while it is defined is known as the domain. The entire set of values that the function's output can produce is referred to as the range. The set of values that could be a function's outputs is known as the co-domain.

Given:

g(x)=f(x-3)

When x= 1

g(1) = f(-2)= 3

and, When x= -1

g(1) = f(-2)= -1

Hence, the true statement is The value of g(1) is 3 .

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Answer:

Volume of a cuboid = length x width x height

8 x 8 x 32 = 2048

Volume of a cylinder = πr^2h

r = diameter/2 = 8/2 = 4

π(4)^2(32) = π(16)(32) = 1607.68

Volume of the shaded solid:

2048 - 1607.68 = 440.32

The correct answer would be C) 440.32 m^3

Average rate of change for interval 5 to 11 boxes is 4.5 , 11 to 20 boxes is 6 and 20 to 25 boxes is 3.2

Average rate of change can be defined as slope of function between two fixed values of x. It can also be defined as change in function per unit or we can say as an average.

Average rate of change (from x = a to x=b) = [tex]\frac{f(b)-f(a)}{b-a}[/tex]

Given table can we represented as No.of boxes = x

Total weight = y

So, for x = 5 , y = 18

x = 11 , y = 45

x = 20 , y = 99

x = 25 , y = 115

(a) Average rate of change for Intervals

5 to 11 boxes = [tex]\frac{45 - 18}{11-5}=\frac{27}{6} = \frac{9}{2}[/tex]

= 4.5

11 to 20 boxes = [tex]\frac{99-45}{20-11} = \frac{54}{9}[/tex]

= 6

20 to 25 boxes = [tex]\frac{115-99}{25-20}=\frac{16}{5}[/tex]

= 3.2

(b) for interval of 11 to 20 boxes we have greatest average weight per box.

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Using proportions, Angela can make 9.5 batch of cookies and the equation to model the solution is y = 2.25x

Proportion is an equation that defines that the two given ratios are equivalent to each other. However, in this case, we can write out an equation that shows the number of cookies she can make with the number of cups of flour available.

To do this, we need to set up a proportional equation with a constant of proportionality.

This is often written as

y = kx

For each batch, she needs 2 1/4 cups

Let's convert this into decimal which will give us 2.25 cups of flour.

y = 2.25x

A. The number of batch she can make will be

21 3/8 ÷ 2 1/4 = 9.5 batch

B) The equation to model the solution is y = 2.25x

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Answer:

Step-by-step explanation:

1 foot=12inch

3000 feet=12 ×3000=36000 inches

72,000 inches=2 miles

36000 inches=(2÷72,000)×36,000=1 mile

Answer:

Coefficient of x

Write in the slope intercept form

35

Step-by-step explanation:

165 - 105x + 3y = 0  Subtract 165 from both sides and and 105x to both sides

3y = 105x - 165  Divide all the way through by 3

y = 35x - 55

The slope is the coefficient of x when the equation is written in the slope intercept form of the line.

The slope is 35

D, graph with a line from 0 comma 0 to 90 comma 30 and an x axis labeled time seconds and a y axis labeled sit ups represents the proportional relationship.

Explanation:

y = 3x

where x is the passage of time.

y stands for how many sit-ups there were.

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