Review the proof of cos(A - B) = cosAcosB + sinAsinB.
Which of the following complete step 4 of the proof?
1 and 1
2 and 1
(cosAcosB)2(sinAsinB)2 and (cos2(A – B))((sin2(A – B))
(cos2A + sin2A)(cos2B + sin2B) and (cos2(A – B))(sin2(A – B))
Answer:
Option (2)
Step-by-step explanation:
Step 1.
[tex]\sqrt{(\text{cosA-cosB})^2+(\text{sinA-sinB})^2}=\sqrt{(cos(A-B)-1)^2+(sin(A-B)-0)^2}[/tex]
Step 2.
(cosA - cosB)² + (sinA - sinB)² = [cos(A - B) - 1]² + [sin(A - B) - 0]²
Step 3.
cos²A + cos²B - 2cosAcosB + sin²A + sin²B - 2sinAsinB = cos²(A - B) + 1 - 2cos(A - B) + sin²(A - B)
Step 4.
2 - 2cosAcosB - 2sinAsinB = 1 - 2cos(A - B) + 1
Step 5.
cosAcosB + sinAsinB = cos(A - B)
Therefore, Option (2) will be the answer.
Answer:
the answer is 2 and 1 or B
Step-by-step explanation:
The cost of producing a smartphone is $42.73 per phone. Additionally, the smartphone company pays a flat rate of $175 to ship each store's order. Write an equation to model the costs for the smartphone company (y) to produce x number of smartphones and ship them to one store
Answer:
y=42.73x+175
Step-by-step explanation:
42.73=m and 17=b
Answer:
y=42.73x+175
Step-by-step explanation:
i know i did it
True or False: X=3 is the solution to 2x+10/5=4.
1. True
2. False
Answer:
Step-by-step explanation:
False
I WILL GIVE 50 POINTS AND BRAINLIEST. Now do I have ur attention
:P
Say some interesting fact or something cool or funny. Winner gets brainliest
Answer:
the same type of skin on your lips is the same type of skin on you bo- it wont let me say it haha
Answer:
What's the best thing about Switzerland.
Answer:
I don't know, but the flag is a big plus.
Step-by-step explanation:
3x+6=-3(2x+4)
Show your work
Answer:
[tex]\boxed {x = -2}[/tex]
Step-by-step explanation:
Solve for the value of [tex]x[/tex]:
[tex]3x + 6 = -3(2x + 4)[/tex]
-Use Distributive Property:
[tex]3x + 6 = -3(2x + 4)[/tex]
[tex]3x + 6 = -6x - 12[/tex]
-Take [tex]6x[/tex] and add it to [tex]3x[/tex]:
[tex]3x + 6 + 6x = -6x + 6x - 12[/tex]
[tex]9x + 6 = -12[/tex]
-Subtract both sides by [tex]6[/tex]:
[tex]9x + 6 - 6 = -12 - 6[/tex]
[tex]9x = -18[/tex]
-Divide both sides by [tex]9[/tex]:
[tex]\frac{9x}{9} = \frac{-18}{9}[/tex]
[tex]\boxed {x = -2}[/tex]
Therefore, the value of [tex]x[/tex] is [tex]-2[/tex].
2(x+6) ^2+ 4 = 20
explain step by step please (square root property)
Answer:
x=2√2-6, -2√2-6
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable. Hope this helps.
My Fav Football team what’s yours? Follow and Like
Answer:
I don't like Football...
Step-by-step explanation:
Answer: My fav is the New York Giants
Step-by-step explanation:
huh?
6(2 + 4) - 1
_________
2 x 3 + 1
Answer:
equaul
Step-by-step explanation:
What is the domain of the decreasing function?
Answer:
A function f is called decreasing on an interval if f (a) > f (b) whenever a < b and a, b are in the interval.
Step-by-step explanation:
The domain of the function shown here is the interval [1, 6].On the interval [1, 3], the graph of this function gets higher from left to right; thus we say that this function is increasing on the interval [1, 3].
On the interval [3, 6], the graph of this function gets lower from left to right; thus we say that this function is decreasing on the interval [3, 6].
what is 12×12= I don't know
Answer:
144
Step-by-step explanation:
looked it up :)
Solve the following system of equations.
3x + 2y - 5 = 0
x = y + 10
Make sure there are NO SPACES in your answer. Include a comma in your answer.
ANSWER:
30 Points!!! Which translation rule describes the translation that is 2 units to the right and 8 units down? (1 poina
(x,y) → (x + 2, y - 8)
(x, y) (x - 2, y - 8)
(x,y) → (x-2, y+8)
(x, y) (x + 2, Y + 8)
Answer:
Answer is A
Step-by-step explanation:
(x,y) → (x + 2, y - 8)
when moving to the right 2 the x coordinate increases by two when moving down 8 the y coordinate decreases by eight
A 2-yard piece of string costs 1.50$. What is the price per foot?
PLEASE HELP
WILL MARK BRAINLIEST
Answer:
0.013333333333333
Step-by-step explanation:
short answer would be 0.013 i think lol
Hi! I believe your answer is $0.25 (twenty-five cents). There are 3 feet in a yard, so in 2 yards, there are 6 feet. If we want to know the cost per foot, we need to divide 1.50 by 6. The quotient is 0.25, or $0.25 per foot. I hope this helps you! Good luck and have a great day/night. ❤️✨
Solve for n: 2n - 4 < 16
Answer:
n<10
Step-by-step explanation:
Answer:
n=10 ,,,,,,,,,,,,,,,
Zack delivers mail for the post office.everyday he walks a seven mile route.How many miles does Zack walk in one month if he works 22 days a month
If im right give me brainliest
Answer: 154
Step-by-step explanation: 22 represents days 7 represents miles he walks a day i think you to have to multiply. 22 times 7 is 154
Answer this question correctly for 10 pts and brainlesit! be first :)
What is the question?
FIRST CORRECT ANSWER WILL GET BRAINLIEST!!!!!!!!!!!
Find the slope represented on the graph
A)-2/3
B)2/3
C)-3
D)3
Answer:
B
Step-by-step explanation:
You can do rise over run or use the slope formula which is y2-y1/x2-x1
Function or not function please help I will give brainless
Answer:
It is a not a Function.
Because one number has two arrows pointing to two different numbers.
Answer:
No
Step-by-step explanation:
(the image is fuzzy so you can't really see the lines)
It seems that when x = 1, f(x) is both 4 and 5.
While two different x values can equal the same y value, one single x value cannot be equal to more than one value.
If this was a function that could be graph, there would be an extra dot at (1, 4) or (1, 5) since 1 is equal 4 or 5. This is why it is not a function.
What’s the answer for b please?
Answer:
Maybe its 41?
Find the slope of the table
Answer:
y= -.5x+2
Step-by-step explanation:
Which of the following slopes would make the "steepest" line?
A.
1/2
B.
3/2
C.
3
D.
4/5
Answer:
D 4/5
Step-by-step explanation:
Answer:
c
Step-by-step explanation:
try giving all of the fractions the same denominator. then, whichever has the biggest numerator is the steepest slope!
the number that 5, 2, and 1 all have in common is 10, so for this question, we'll put all of the fractions over 10.
a. 1/2 = 5/10
b. 3/2 = 15/10
c. 3 = 3/1 = 30/10
d. 4/5 = 8/10
30 is the biggest numerator out of these 4.
En cierto cultivo, inicialmente había 1000 amebas que se reproducen por biparticion cada día ¿Cuántas amebas habrá al cabo de 30 días después que se inició el cultivo ?
Answer: 1,073,741,824,000 amebas
Step-by-step explanation:
Bipartición significa que la población de amebas se duplica cada día.
Entonces si inicialmente hay 1000, después de un día van a haber:
2*1000.
Después del segundo día se vuelven a duplicar, entonces van a haber:
2*(2*1000) = (2^2)*1000
Después del tercer día, lo mismo:
2*(2^2)*1000 = (2^3)*1000.
A esta altura ya se puede ver el patrón, podemos concluir que después de N días, la población de amebas va a ser:
P(N) = (2^N)*1000.
Entonces respondiendo a la pregunta:
¿Cuántas amebas habrá al cabo de 30 días después que se inició el cultivo?
Tenemos que tomar N = 30
P(30) = (2^30)*1000 = 1,073,741,824,000 amebas
Please answer all 3 for 20 points
HELP PLEASE 12 POINTS
i need some help please
plz help me with thi quston
Answer:
448000
Step-by-step explanation:
First 10^4 is just 10*10*10*10=10000
44.8*10000 = 448000
Hope this helped!!
Answer:
4.48 x 10^5
Step-by-step explanation:
44.8 x 10000 = 448000 = 4.48 x 10^5
SOMEONE PLZ HELP JSJSJSNSJNSNSNSNSNNS I HAVE 30 MINS LEFT PLZ
Answer:
the answer is d. x >=4
(5/9 multiplied by -4) + (3/4 multiplied by -6) is ? Please please help ill give brainiest!!
Answer:
- 6 13/18
Step-by-step explanation:
5/9 times -4 is -20 over 9 -20/9 -2 2/9
3/4 times -6 is -18 over 4 -18/4 -4 1/2
You need them to have a common denominator
so you can multiply the first answer by 4 and the second by 9.
You get -242/36 after a while
and then
you simplify.
You can multiply 36 six times into -242 so you get the whole number of 6 plus 216
242-216 is 26
26 over 36 is 13 over 18
-6 13/18
Michael is using a number line to evaluate the expression –8 – 3
Answer:
-11
Step-by-step explanation:
Answer:
-11
Step-by-step explanation:
⚠️⚠️ IM ALMOST DONE please ⚠️⚠️
