Prove that tan(A+B)
cot(A−B)
=
2−2
2−2�

Answers

Answer 1

Triagonometric function tan(A+B)/cot(A−B) is tan²A-tan²B/1-tan²Atan²B

What is Trigonometry?

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

Given,

tan(A+B)/cot(A-B)

tan(A+B)/1/tan(A-B)

(tanA+tanB/1-tanAtanB)/1/(tanA-tanB/1+tanAtanB)

tanA+tanB/1-tanAtanB)×tanA-tanB/1+tanAtanB

We know algebraic identity

(a+b)(a-b)=a²-b²

(tanA+tanB/1-tanAtanB)×(tanA-tanB/1+tanAtanB)

tan²A-tan²B/1-tan²Atan²B

Hence, triagonometric function tan(A+B)/cot(A−B) is tan²A-tan²B/1-tan²Atan²B

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Related Questions

The function f(x) = 150 - 8x represents the distance, in miles, remaining on a trip
x hours into the trip. What is the value of f(5)?

Answers

It’s 110 since when you substitute x for you get 150-8(5) which equals to 110
150-8*5 =
110
That’s the answer


How would the graph of the linear equation y = 2x change if the y-intercept were changed to 3?
O The line would shift down three units.
O The line would shift up three units.
O The line would become more steep.
The line would not change.

Answers

The required answer choice for the linear equation is option 2 (the line would shift up three units).

What is a linear equation?

An equation is said to be linear if the maximum power of the variable is 1. Another name for it is a one-degree equation.

Given, y = 2x

For y-intercept, x = 0

And when the y-intercept is changed to 3. then, y = 3 at x=0

Based on this condition, the equation will be y = 2x + 3

So, the line would shift up three units.

Hence, the required answer choice for the linear equation is option 2.

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Answer:

The line would shift up three units.

Find the 9th term

1/8 , 1/2 , 2…

Answers

You multiply by two or square it. The ninth term will be 128

Tyler’s cell phone has a $50 charge each month, but no initial fee. On the same coordinate plane, graph the cost of Tyler’s cell phone plan over a period of two years. Then describe how the two graphs are the same and how they are different

Answers

1, 50. 2, 100. Etc. Since there is no initial fee the y-intercept is 0.

c) what is an expression for C in terms of b?​

Answers

Answer:

[tex]c=5b[/tex]

Step-by-step explanation:

Since we're solving for c, it should be by itself (normally on the left). If you look at the table, c is just 5 times what it's corresponding b value is, so that's what you write as the equation.

Construct a polynomial function with the stated properties. Reduce all fractions to lowest terms. Third-degree, with zeros of −3, −2, and 1, and passes through the point (2,8).

Answers

The third-degree polynomial function for the given circumstances will be 5y=2(x-1)(x+3)(x+2) with zeros of 3, 2, and 1 and passes through the point (2,8).

What is polynomial?

Sums of terms of the form k-x^n, where k is any number and n is a positive integer, make up polynomials. For instance, the polynomial 3x+2x-5. a description of polynomials. The concepts degree, standard form, monomial, binomial, and trinomial are all covered in this video. An expression that consists of variables, constants, and exponents and is combined using mathematical operations like addition, subtraction, multiplication, and division is referred to as a polynomial.

Here,

y=a(x+3)(x+2)(x-1)

x=2 and y=8

8=a(2+3)(2+2)(2-1)

8=a*5*4

a=8/20

a=2/5

y=2/5(x+3)(x+2)(x-1)

5y=2(x+3)(x+2)(x-1)

The polynomial function for given conditions that is third-degree, with zeros of −3, −2, and 1, and passes through the point (2,8) will be 5y=2(x+3)(x+2)(x-1).

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Simplify the expression. 4x^10 y^-3 over 12x-2y

Answers

The expression 4x^10 y^-3 over 12x-2y is x^8 y^-2 / 3

How to solve the expression:

Any mathematical statement that includes numbers, variables, and an arithmetic operation between them is known as an expression or algebraic expression.

1. Eliminate terms from the denominator and numerator.

2. Combine terms that have been multiplied into a single fraction.

3. Add exponents together.

Here, (Given)

4x^10 y^-3 /12x-2y

solving the expression we get

4x^10 / 12x = x^8 / 3

y^-3 / 2y = y^-2

=> x^8 y^-2 / 3

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation. An expression's structure is as follows: Expression: (Math Operator, Number/Variable, Math Operator).

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It takes Andre 4 minutes to swim 5 laps. How many minutes per lap is that?

Answers

Answer: 0.8 minutes

Step-by-step explanation:

4 divided by 5 =0.8

Answer: 0.8 minutes per lap

Step-by-step explanation:

divide the number of minutes by the number of laps to get a minutes per lap

4/5=0.8

Write an expression that represents the height of a tree that begins at 8.4 feet and increases by 3.8 feet per year. Let's describe the number of years.

Answers

Answer: 8.4 + 3.8y

Step-by-step explanation: The expression is 8.4 + 3.8y ( y represents the amount of years multiplies by 3.8 or the amount grown per year )

Unless there is a total of height or the amount of years there is no way to  complete this problem because there is an infinite number of possibilities.

if you test for the for the mean of the differences in a paired t-test, there are how many degrees of freedom?

Answers

There is zero or no degree of freedom in  the mean of the differences in a paired t-test.

For the paired t-test, we need two variables. One variable defines the pairs for the observations. The second variable is a measurement. Sometimes, we already have the paired differences for the measurement variable. Other times, we have separate variables for “before” and “after” measurements  for each pair and need to calculate the differences.

We also have an idea, or hypothesis, that the differences between pairs is zero. It is also known as the dependent samples t-test, the paired-difference t-test, the matched pairs t-test and the repeated-samples t-test.

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one method used to measure diversity in a given area is the simpson index. a. how is it calculated?

Answers

Method used to calculate the measure of diversity of species of a particular community is Simpson diversity index which is given by

d = ∑nₐ(nₐ - 1)/N(N - 1).

As given in the question,

Let us consider 'd' represents the diversity of the species in a particular community.

nₐ represents the number of organism  belongs to a particular given species .

N represents the total number of organism present.

Then calculation of Simpson diversity index is given by :

d =∑nₐ(nₐ - 1)/N(N - 1)

The range of the diversity of Simpson diversity index is in between 0 to 1.

Therefore, the calculation Simpson diversity index is given by

d = ∑nₐ(nₐ - 1)/N(N - 1).

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12. CT has a point C at (-7,-9) and point T at (9,7).
What are the coordinates of the midpoint?
A) (-1,-1)
C) (-1, 1)
B) (1,-1)
D) (1, 1)

Answers

The midpoint of CT is located at (b) (1, -1)

How to determine the coordinates of the midpoint?

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

C = (-7, -9)

T = (9, 7)

The midpoint of the line CT can then be calculated as

Midpoint = 1/2 * (C + T)

So, we have the following representation

Midpoint = 1/2 * (-7 + 9, -9 + 7)

Evaluate

Midpoint = 1/2 * (2, -2)

So, we have

Midpoint = (1, -1)

Hence, the midpoint is (1, -1)

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please answer this inequality |3d-7|>28 ​

Answers

Answer: d < −7 or d > 35/3

Step-by-step explanation:

Given two functions:
f(x) = -8x^3 + 9x^2 - 7x + 8
g(x) = −4x^3+ 3x^2 - 4x - 6
Find (f+g)(x)

Answers

Sum of two function f(x) and g(x) is -12x³+12x²-11x+2

What is function?

A mathematical expression that indicates a relationship between independent variable and dependent variable. If x is an independent variable function is denoted by f(x) or g(x).

How do we determine the sum of two function?

we are given two functions f(x)= -8x³+9x²-7x+8

                                           g(x)= -4x³+3x²-4x-6

now we need to add these two. f(x)+g(x)= -12x³+12x²-11x+2

hence, we obtain another function.

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Stevensville has a population of 114,000. The population is decreasing at a rate of 1.5% each year. Which of the following functions would evaluate this situation?
p(s)=114000.0.985³
p(s) =114000
p(s)=114000x+0.985
None of the choices are correct.

Answers

Answer:

none of the choices

Step-by-step explanation:

normally, the form for the answer would be p(s)=Ab^x, but I don't see that here in any of the answer choices. The answer would be p(s)=114,000(0.985)^x.

hope this helps, but downvote this answer if it is wrong :(

Please help! Worth more points will mark as brainiest

Answers

Answer:

252 m^2

Step-by-step explanation:

The equation for surface area in a rectangular prism is SA = 2 (lh +wh + lw ).

So when we plug in the numbers inti the equation we do SA = 2(12×3 + 6×3 + 12×6)

FOLLOW P.E.M.D.A.S (parentheses, exponents, multiplication, division, addition, subtraction)

we get SA = 2(36 + 18 + 72)

then we multiply 2, by each of the numbers.

SA = (72 + 36 + 144)

Add them together and you get

SA = 252

Kara downloaded 384 selfies from her cell phone to her laptop. These selfies took up 768 megabytes of space on her laptop. Each selfie took up the same amount of space. How many megabytes do 40 selfies take up?

Answers

Answer:

80 megabytes

Step-by-step explanation:

768/384= 2 megabytes per photo

40 x 2 = 80 megabytes

What system of linear inequalities is shown in the graph?

Answers

Answer:

y>x?

Step-by-step explanation:

For a project in his Geometry class, Yusuf uses a mirror on the ground to measure the height of his school building. He walks a distance of 13.95 meters from the school, then places a mirror on flat on the ground, marked with an X at the center. He then steps 2.15 meters to the other side of the mirror, until he can see the top of the school clearly marked in the X. His partner measures the distance from his eyes to the ground to be 1.35 meters. How tall is the school? Round your answer to the nearest hundredth of a meter.

Answers

The height of the school is 9 meters.

What is proportion?

A proportion is an equation in which two ratios are set equal to each other. For example, if there is 1 boy and 3 girls you could write the ratio as 1 : 3 (for every one boy there are 3 girls) 1 / 4 are boys and 3 / 4 are girls. 0.25 are boys (by dividing 1 by 4).

Angle of incidence = Angle of reflection

As we can see in the picture attached, both the angles (θ) are equal.

m∠ACB = m∠ECD = 90° - θ

m∠ABC = m∠ADC = 90°

Therefore, both the triangles ΔABC and ΔEDC will be similar.

And by the property of similar triangles, their corresponding sides will be proportional.

 AB/ED = CB/CD

1.35/ED = 2.15/13.95

     ED = 8.75 meters

     ED ≈ 9 m.

Hence, the height of the school is 9 meters.

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What is 30% off $75?

Answers

Answer:

22.5

Step-by-step explanation:

Answer:

22.5

Step-by-step explanation:

= (0.3)(75) = 22.5

Hope this helps

What is the inequality shown? -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 23 4 5 6 7 8

Answers

Answer:

-4<x≤5

Step-by-step explanation:

first at negative 4 there is a white dot and it’s pointing right so x is greater then it

And at 5 it is a closed dot pointing left so x is less then and equal to 5

Hopes this helps

........... i need help past due

Answers

Answer:

[tex]\frac{16}{35}[/tex]

Step-by-step explanation:

[tex]\frac{\frac{2}{5} }{\frac{7}{8} }[/tex]

There is a couple of ways that you can do this.  I am going to divide the top and bottom fractions by [tex]\frac{8}{7}[/tex]

[tex]\frac{\frac{2}{5} }{\frac{7}{8} }[/tex] x [tex]\frac{\frac{8}{7} }{\frac{8}{7} }[/tex] = [tex]\frac{\frac{16}{35} }{\frac{56}{56} }[/tex] = [tex]\frac{\frac{16}{35} }{1}[/tex] = [tex]\frac{16}{35}[/tex]

Find Volume of a cone

Answers

Answer:

Your answer is 65.97 meters.

Hence, the volume of the cone is [tex]64.998m[/tex] meters.

What is the volume of cone?

The volume of a cone defines the space or the capacity of the cone. A cone is a three-dimensional geometric shape having a circular base that tapers from a flat base to a point called apex or vertex.

Here given that,

The radius of cone is [tex]3m[/tex] and a height of a cone is [tex]7m[/tex].

As we kow the volume of cone is [tex]\pi r^2\frac{h}{3}[/tex].

Now substitute the values in the general formula of cone then,

[tex]V=3.14(3)^2\frac{7}{3}\\\\V=3.14(9)(2.3)\\\\V=3.14(20.7)\\\\V=64.998m[/tex]

Hence, the volume of the cone is [tex]64.998m[/tex] meters.

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The graphs below have the same shape. What is the equation of the red graph?

Answers

The equation of the red graph is x² + 2

What is meant by Equation ?

There are many different ways to define an equation. The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions.

For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign. Mathematical algebraic equations typically have one or more variables.

Since the function in the graph is headed upward , we know the portion of  x²  is positive . And since the highest point of the red line on the y-axis is 2, we can conclude the function represented by the red line is

x² + 2

Therefore the equation of red graph is  x² + 2

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5x -4 =19 please help me it’s for my do NOW

Answers

5x - 4 = 19
Add 4 to both sides
5x = 23
Divide 23 by 5
x = 4.6
Also can be expressed x = 23/5 or x = 4(3/5)

A lake fishing map is laid out on a coordinate plane with each unit equal to 1 mille. The boat is launched from the point (7,0) and goes to point (7.-7) to fish. From there, the boat
travels to (0, -7) to fish and then goes back to the launch point.
Determine the total number of miles traveled. Round to the nearest whole number.
•10 miles
•12 miles
•14 miles
•24 miles

Answers

The total number of miles traveled by the boat, found using Pythagorean Theorem, rounded to the nearest whole number is about 24 miles

What does the Pythagorean Theorem state?

Pythagoras theorem indicates that the square of the hypotenuse side of a right triangle is the same as the sum of the squares of the legs.

The coordinates of the location of the boat as goes to fish are;

The coordinate of the point at which the boat is launched = (7, 0)

The coordinate of the point at which the boat goes to fish = (7, -7)

The coordinate of the location the boat then travels to in order to fish = (0, -7)

Let A represent the point (7, 0), and let B represent the point (7, -7), and let C represent the point (0, -7), we get;

A(7, 0), B(7, -7), C(0, -7)

The length of segment AB = 0 - (-7) = 7

Length of segment BC = 7 - 0 = 7

The x and y-coordinates of the points A and C are different therefore, the length of the segment AC can be found using the distance formula used for finding the distance between two points on the coordinate plane (a form of the Pythagorean Theorem)  as follows;

d = √((x₂ - x₁)² + (y₂ - y₁)₂)

The distance between the points A(7, 0), and C(0, -7), is therefore;

Length of segment AC = √((0 - 7)² + (-7 - 0)²) = 7·√2

The total number of miles the boat traveled is therefore;

Total distance traveled = AB + BC + AC

Therefore;

Total distance traveled = 7 + 7 + 7·√2 ≈ 23.889 ≈ 24

The total distance the boat travels is about 24 miles

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Dean Willis earns $315.75 per weck. The Social Security tax rate is 6.2% and Medicare tax is 1.45% of gross pay. How much is the deduction from his pay check for Social Security and Medicare?

Answers

The total deduction from Dean's paycheck for Social Security and Medicare is $24.11.

What is a percentage?

A percentage is a way of expressing a number as a fraction of 100. It is often used to express a proportion or a ratio, and is denoted by the symbol "%".

To find the deduction from Dean's paycheck for Social Security and Medicare, we need to calculate the total amount of tax that he owes based on his gross pay.

First, we can calculate the Social Security tax by multiplying Dean's gross pay by the tax rate:

Social Security tax = $315.75 x 6.2% = $19.54

Next, we can calculate the Medicare tax by multiplying Dean's gross pay by the tax rate:

Medicare tax = $315.75 x 1.45% = $4.57

To find the total deduction from Dean's paycheck, we can add the two amounts:

Total deduction = $19.54 + $4.57 = $24.11

Hence, the total deduction from Dean's paycheck for Social Security and Medicare is $24.11.

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what is the equation for the function (2,44) and (5,80)

Answers

Answer:

5, 80

Step-by-step explanation:

because 5b / 280 = c2 - b2

Answer:  y= 12x +22

Step-by-step explanation:

Find the slope and y intercept

Rebecca buys some scarves that cost $5 each and 2 purses that cost $12 each. Rebecca can spend AT MOST $39. Write an inequality that can be used to find the number of scarves she can buy.

Answers

Answer:

$39-($12x2)=$15

$15 ÷$5=3scarves

Step-by-step explanation:

What are the vertices of ΔA'B'C produced by T⟨−3, 6⟩ (ΔABC) = ΔA'B'C? The graph with X-coordinate marks -4, -2, 0, 2, 4 and Y-coordinate mark -4, -2, -1, 0, 2, 4. -The triangle ABC with coordinates A at (3, 0), B at (3, -2), C at (0, -3).

Answers

[tex]\end{aligned}$$[/tex]So the new coordinates will be ( 0,6 ) , ( 0,4 ) , ( -3 , 3 )

What are coordinates of triangle ?

A special example of barycentric coordinates for a triangle is referred to as triangular coordinates, and it is also known as a ternary plot or areal coordinates. Triangular coordinates can also refer to any of at least three other related systems of coordinates in the Euclidean plane.

Given[tex]$\[/tex] triangle ABC[tex]$[/tex] has co-ordinates:

A=(3,0), [tex]\quad[/tex]B=(3,-2), C(0,-3)

Now transaction of [tex]$(-3,6)$[/tex]  is applied on  Co-ordinates of [tex]$\triangle A B C$[/tex]. Therefore, new Co-ordinates will become:

[tex]$$[/tex] A[tex]^{\prime}= ( 3-3 , 0 + 6 ) = (0,6) . \\[/tex]

B[tex]^{\prime}=(3-3,-2+6)=(0,4) . \\[/tex]

C[tex]^{\prime}=(0-3,-3+6)=(-3,3)[/tex]

[tex]\end{aligned}$$[/tex]So the new coordinates will be ( 0,6 ) , ( 0,4 ) , ( -3 , 3 )

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Find an explicit formula for the following equence, an which tart with a1=23. 23,34,45,56, kjlklnlkjklnnnnnnnnnnnnnlkhi Mr. Townsend needs to make 13 pairs of butterfly wings for costumes for a play. Each pair of wings is made with yard of fabric. The fabric costs $8 per yard. You'll apply properties of multiplication in the following steps to find the total cost of the fabric. 1. Use multiplication to write an expression for the amount of fabric needed to make 13 pairs of wings. (2 points) 2. Multiply the amount of fabric by the price per yard to find an expression for the total cost.(2 points) 3. Use the associative and commutative properties to rearrange the terms in the expression to make it easier to calculate. Explain why the rearranged expression is easier to work with. (3 points) 4. Simplify your expression to find the total cost. Show your work. (3 points) What's g -6g+5=4g-2-3g predict the effects on plants if the red sky phenomenon occurs for a long period and give the reason why according to a michigan state university study, what fraction of friends with benefits relationships went on to become actual romantic relationships? beethoven's only opera is entitled group of answer choices madame butterfly. fidelio. don giovanni. the magic flute. Overall, what is the reaction in europe to genetically engineered food? question 30 options: a. europe has not taken a position on genetically modified (engineered) food b. europe has the most scientist in the world dedicated to genetically modified (engineered) food c. europe is leading the fight against genetically modified (engineered) food d. europe is supporting genetically modified (engineered) plants, but genetically engineered animals. If you face a violation of your equal rights as a woman in the United States, your lawyer might draw on which of the following to supportyour case?a. Equal Rights Amendmentb. 14th Amendment (Equal Protection Clause)c. Equal Rights Amendmentd. The 19th Amendment Norberto received the following scores on his last five spelling tests: 88, 76, 93, 85, and 98. Which of the following statements istrue?The median of the set of scores is 93.The mean and median of the set of scores are the same.The mode of the set of scores is 88.The mean of the set is less than the median. The information needed to prepare a statement of cash flows could come from all of the following sources, except the: statement of retained earnings. the root tip cells of an onion plant have 8 pairs of chromosomes. which of the following correctly describes the number of chromosomes in an onion root tip cell at a specific stage of the cell cycle? The circumference of a circle is 11 cm. What is the area, in square centimeters? Express your answer in terms of . Use the product property to rewrite log2 256b Which word in the following sentence is an appositive?My older brother, Paolo, is the owner of a computer company.a. brotherb. Paoloc. ownerd. company Is this a function? Explain, why or why not!864200246Edit View Insert Format Tools Table which part of the dual-process model of coping with bereavement involves helping the survivor master skills such as learning how to do routine home maintenance? a nurse is completing an admission interview of a client newly diagnosed with multiple myeloma. the client expresses concerns about insurance coverage and financial needs. based on this information, to whom would the nurse initiate a referral? the nurse is aware, when caring for patients with renal disease, that which substance made in the glomeruli directly controls blood pressure? renin albumin vasopressin cortisol When pulled, stretchy objects such as rubber bands exert elastic force. Gently hold one end of the rubber band and pull on the other end. You will feel the rubber band pulling back. How does the force exerted by the rubber band change as you increase its length? What do you observe?