2cosAcosB =

• cos(A + B) + cos(A - B)
• sin(A - B) + tan(A + B)

Answers

Answer 1

Answer:

2cosAcosB = cos( A + B ) + cos( A - B )


Related Questions

Simplify
[tex] \binom{2x + y \: \: 3y}{6 \: \: \: \: \: 4} = \binom{6 \: \: 0}{6 \: \: 4} [/tex]
Find x and y

Answers

Answer:

I am hacker

Step-by-step explanation:

[tex] \huge \color{blue}{ \rule{10000pt}{100000pt}}[/tex]

[tex] \huge \color{blue}{ \rule{10000pt}{100000pt}}[/tex]

[tex] \huge \color{blue}{ \rule{10000pt}{100000pt}}[/tex]

[tex] \huge \color{blue}{ \rule{10000pt}{100000pt}}[/tex]

[tex] \huge \color{blue}{ \rule{10000pt}{100000pt}}[/tex]

[tex] \huge \color{blue}{ \rule{10000pt}{100000pt}}[/tex]

[tex] \huge \color{blue}{ \rule{10000pt}{100000pt}}[/tex]

[tex] \huge \color{blue}{ \rule{10000pt}{100000pt}}[/tex]

you have a pathetic life

Answer:

By comparing ,

2x + y = 6

3y = 0

y= 0/3

•°• y = 0

2x + y = 6

2x + 0 = 6

2x = 6

x = 6/2

•°• x = 3

hope it helps :)

Which statement is false?

A. The lines of symmetry in a circle are too many to count.
B. A scalene triangle has no line of symmetry.
C. A trapezoid has only one line of symmetry.
D. A regular octagon has only four lines of symmetry.

Answers

Answer:

options a is answer

Step-by-step explanation:

options a is answer

Find the quotient: 0.12)78.6.

Answers

0.12 divided by 78.6 = 0.00152671755

y^ –7x^3 zx^–1y^7 z^–4 simplified

Answers

Answer: -7x^4 y - 7zx + y - 4

Step-by-step explanation:

There are 40 students in your class of which 23 are boys. What fraction of the students are girls?​

Answers

Answer:17/23

Step-by-step explanation:

Answer:  17/40 of the students are girls.

Step-by-step explanation:

First, to find the number of girls in the class, we can subtract the number of boys (23) from the total number of students (40) to get:

40 - 23 = 17

There are 17 girls in the class.

Finally, to get the fraction of the girl students of the class, we can divide the number of girls (17) by the total number of students (40) to get:

17 ÷ 40 = [tex]\frac{17}{40}[/tex]

Since the fraction [tex]\frac{17}{40}[/tex] is already simplified, the final answer comes out to be [tex]\frac{17}{40}[/tex].

3n + 6n -4 = 2n + 2 + 5n​

Answers

Answer:

3n +6n-4=2n+2+5n

9n-4=7n+2

9n-7n=2+4

2n=6

n=6÷2

n=3

Jamie is x years old. His friend Ana is the same age.
Enter an expression in the box to represent the sum of Jamie's and Ana's ages.

Answers

Answer:  2x

Explanation:

Each person is x years old. Adding those unknown ages gets us x+x = 2x

We can think of it like x being one box, so x+x represents having two boxes which shortens to 2x.

Two motorcyclists, who start their journeys at the same instance from two different cities,
travel with uniform speeds of 40 km/h and 50 km/h respectively towards each other. If they meet
each other after 1.5 hours after commencing their journeys, find the distance between the two
cities.
QUICK

Answers

Answer:

54

Step-by-step explanation:

HELP ME PLEASEEEE I WILL GIVE BRAINLIEST

Answers

Answer: DE, EW WD

Step-by-step explanation:

It looks shortest to longest...i think its the best answer. good luck :>

Meanwhile, plants are absorbing_(H2O) through their roots and storing it within their cells

Answers

The plants intake Water and Carbon Dioxide those are the reactants And after the plant is exposed to light energy also known as sunlight it produces glucose and oxygen which is the process of photosynthesis and and it takes place in the chloroplast of a plant cell.

Step-by-step explanation:

H²O+CO²-Sunlight-C⁶H¹²O⁶+O²

Chemical Equation for Photosynthesis

Find the equation of the line passing through the point (−5,−9) and parallel to the line y=3x+2 .

Answers

Answer:

Root:(-⅗,0)

vertical intercept:(0,5)

Step-by-step explanation:

Find the value of 5x + 6 when x = -2

Answers

Answer:

- 4

Step-by-step explanation:

Substitute x = - 2 into the expression

5x + 6 = 5(- 2) + 6 = - 10 + 6 = - 4

I need help with this question

Answers

Take a picture of your work and send it so I can help you

How much interest will you earn if you deposit
$4000 into an account compounded semi-annually
at 2.8% for 5 years?

Answers

Answer:

45215.31

Step-by-step explanation:

$596.6 is the interest will you earn if you deposit $4000 into an account compounded semi-annually at 2.8% for 5 years.

What is compounding?

Compounding is the process whereby interest is credited to an existing principal amount as well as to interest already paid. Compounding thus can be construed as interest on interest—the effect of which is to magnify returns to interest over time, the so-called “miracle of compounding.”

According to question,$4000 into an account compounded semi-annually at 2.8% for 5 years.

We have to find interest rate.

Formula for compound interest is [tex]P[(1+i)^n-1][/tex]

Since compounding is semi-annually,

[tex]i=\frac{0.028}{2}[/tex][tex]=0.014[/tex] (since compounding is semi-annually)

[tex]n[/tex]=number of years=[tex]5[/tex] ×[tex]2=10[/tex] years (since compounding is semi-annually)

So, compound interest

[tex]=[/tex][tex]P[(1+i)^n-1][/tex]

[tex]=4000((1+0.014)^{10} -1))[/tex]

[tex]=4000[/tex]×[tex]0.1491[/tex]

[tex]=596.6[/tex]

Hence we can conclude that,$596.6 is the  interest will you earn if you deposit $4000 into an account compounded semi-annually at 2.8% for 5 years.

Learn more about  compound interest here:

https://brainly.com/question/14295570?referrer=searchResults

#SPJ2

Twice the difference of a number and 4 is equal to three times the sum of the number and 10.

Answers

Answer:

2(x-4)=3(x+10)

Step-by-step explanation:

A line with a slope of 8 goes through the point (2, 27). It also goes through the point (-2,p). What is the value of p?.

Answers

Answer:

The value of p is -5.

Step-by-step explanation:

Given the slope and a known point, you have 3 of the 4 variables and you can use them to solve for the y-intercept of the line.

[tex]y=mx+b\\(27)=(8)(2)+b\\27=16+b\\11=b\\b=11[/tex]

Now, with the slope and the y-intercept, you can write the equation of the line:

[tex]y=8x+11[/tex]

Finally, you can use that equation to solve for y at x = -2:

[tex]y=8(-2)+11\\y=-16+11\\y=-5[/tex]

The value of p is -5.

You can also see that on a graph.

NO LINKS OR FILES THINGS LIKE THAT!!!!!!
DUE TODAY!!!!!!
Write format:
(Quarters,Dimes)
No spaces
Example:
5 quarters, and 2 dimes should be written as (5,2)

Answers

Answer:

  (4,8)

Step-by-step explanation:

One of the marked points on the black line is (4,8).

__

You will notice that the only combination worth $3.00 is (12,0).

the elevation of the salton sea in california is 66 meters below sea level. which integer best represents this elevaton in meters?

please help

Answers

Answer:

-66

Step-by-step explanation:

If we use 0 as the centre of all numbers, and another number is 66 below this baseline, we could say that it is -66 meters above sea level, or 66 meters below sea level.

Which choices are equivalent to the expression below? Check all that apply.
5/3
I A. 75
]
B. v3.15
I C. 75
O D. 125. 3
IE. 45
0 F 15.15

Answers

Answer:

ADF

Step-by-step explanation:

A.root 75=root25 xroot3=5root3

B.=root15

C=75

D=5root3

E:=root9xroot5=3root5

F=root5xroot5xroot3=5root3

The solution is Option A , Option D , Option F

The values of the equations are √75 , √25 x √3 and √15 x √5

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

A = 5√3   be equation (1)

On simplifying the equation , we get

The value of A = √ ( 5 )² ( 3 )

The value of A = √25 x √3

The value of A = √75

The value of A = √15 x √5

Hence , the values of the equations are √75 , √25 x √3 and √15 x √5

To learn more about equations click :

https://brainly.com/question/19297665

#SPJ2

An office administrator earns $16 an hour, and she works 48 hours a week.
What is her weekly wage?

Answers

Answer:

768

Step-by-step explanation:

16x48= 768

Answer:

768

Step-by-step explanation:

you multiply 16 times 48 to find the weekly wage

Find the slope of the line.

Answers

first you have to pick any two points on the line

(-3,4) and (0,-2)

then you subtract the y values

-2-4= -6

after that you subtract the x values

0 - (-3)= 3

the slope is -6/3, or -2

I need help with this please hurry it's timed​

Answers

Answer:

60 inches

Step-by-step explanation:

26^2+54^2 = 3592

[sqrt]3592 = 59.9 --> 60inches

Question 3 of 10
Find tan 0

Answers

[tex]\tan \theta = \dfrac{\text{Opposite side}}{\text{Adjacent side}} = \dfrac{16}{12}[/tex]

A. y = 2x
B. y = x ÷ 2
C. y = x – 1
D. y = x + 1

Answers

Answer:

D) y = x + 1

Step-by-step explanation:

D is the answer because the slope is 1 and the y-intercept is 1

15.
How many values are in the data set whose histogram is shown below?

Answers

The total values in the dataset is 24 values

From the given histogram, to get the number of values in the dataset, we will have to trace each bar to the y-axis and then take the sum.

For the black bar, the total values of the dataset will be 11 + 2 = 13For the white bar, the value of the data st will be 3For the grey bar, the total values of the dataset will be 1 + 2 = 3For the ask bar,  the total values of the dataset will be 2 + 3 = 5

The total values of the dataset = 13 + 3 + 3 + 5

The total values of the dataset = 24 values

Hence the total values in the dataset is 24 values

Learn more on histogram here: https://brainly.com/question/9388601

Answer:

answer is 22, is you add all the values

Step-by-step explanation:

Karen has 7/8 cup of ice cream. How many 1/3 cup servings can she make ?

Answers

Answer:

She can make 4 1/3 cups

Step-by-step explanation:

Answer:

2.625 should be your answer

Step-by-step explanation:

hope you have a good day!

Help help help help help help help math

Answers

Answer:

Angle 6

Step-by-step explanation:

They are both the same angle size

Answer:

Angle 1

Step-by-step explanation:

Refer to the attached picture

If a function is restricted, is there no end behavior?

Answers

Answer:

If a function is restricted, it still has an end behavior!!!

Step-by-step explanation:

Let's say we have f(x)=(x-4)^2, x≥4.

If this function is graphed, we can see that the line starts at (4,0). It only has one side to it.

This means that it is restricted on the left side. In other words, x has to be greater than or equal to 4.

However, just because this function is restricted doesn't mean it doesn't have an end behavior!

As we can see, the graph continues on into eternity. As a result, we can write the end behavior as:

x --> ∞, f(x) --> ∞

There is no end behavior for the left side because that's where the graph is restricted.

Hope this helps!

y=x-5 find the four points in the inverse

Answers

(0,5)
(-5,0)
(-1,4)
(1,6)

i’m not sure what your asking, but it’s an equation of a like with the y int at 5 with a slope of one

The speed of a train is 90 km per hour so how much will it be in m /s .​

Answers

Answer:

90km/h in m/s will be

90×1000m/3600s ( convert 1km/1h to 1000m/3600sec )

=> 25m/s

we have: 90 km/h =  90 ÷ 3,6 = 25 m/s

Ok done. Thank to me :>

Other Questions
Find the length of side Y (this is from the geometry for enjoyment and challenge textbook) PLEASE ANSWER ASAP IT'S DUE TOMORROW!!! The decomposition of ethanol (C2H5OH) on an alumina (Al2O3) surface C2H5OH1 g2 h C2H4 1 g2 1 H2O1 g2 was studied at 600 K. Concentration versus time data were col- lected for this reaction, and a plot of [A] versus time resulted in a straight line with a slope of 24.00 3 1025 mol/L s. a. Determine the rate law, the integrated rate law, and the value of the rate constant for this reaction. b. If the initial concentration of C2H5OH was 1.25 3 1022 M, calculate the half-life for this reaction. c. How much time is required for all the 1.25 3 1022 M C2H5OH to decompose? he .......... be eating pizza. Do you want kostenlos points? Why they are yours my friend, Don't go spending them all in one place! Explain how a cell uses mitochondria, cell membrane, lysosomes, and vacuoles to make energy. Compared to the simultaneous condition, the serial condition of the experiment would be more likely to cause: Can you help me i Dont understand is the following section will discuss why some teenagers wear makeup to school a claim or not a claim should be guarded for the survival of democracy. please help :(Which of the following defines a cash crop?any crop grown to be sold for direct saleany crop grown to be sold to other growersany crop grown to be sold as a raw materialany crop grown to be sold on the commodities market about distillation methods Show two ways three people could share a 5 segment chewy worm Plz help (MATH)................... What is the greatest common factor of 8, 28, and 48? 11/2-2/3 help me plz How do I solve this WAIT..WHAT?!?!On April 30, 1789, George Washington, standing on the balcony of Federal Hall on Wall Street in New York, took his oath of office as the first President of the United States. As the first of every thing, in our situation will serve to establish a Precedent, he wrote James Madison, it is devoutly wished on my part, that these precedents may be fixed on true principles. RIGHT? How did the winds affect columbus' journey? 4 km3 kmWhat is the length of the hypotenuse? If necessary, round to the nearest tenth.:kilometers Combine the like terms in each expression to find the matching simplified expression.y + x - 2 - 6x > |_| X-15xy + 4x - 5xy = 3x > |_|y - 5x 2 2x +3 -x-4 > |_| X