Mathematics High School

Find all solutions to the equation.
cos^2x + 2 cos x + 1 = 0 (4 points)

Find All Solutions To The Equation.cos^2x + 2 Cos X + 1 = 0 (4 Points)

Answers

Answer 1

Answer:

cos^2x + (1+1)cos x + 1 = 0

or,cos^2x + cos x + cos x + 1 = 0

or,cos x(cos x + 1) + 1 (cos x + 1) = 0

or, (cosx + 1) + (cosx + 1) = 0

either

cosx + 1 =0 or cosx +1 =0

Related Questions

What is the solution to -418-3x) 2 6x - 8?
O X2
O xs-1/
O X 24
O x 34

Answers

Answer:

O X 24

Step-by-step explanation:

i think this is the right answer

What is 1,000,000 x 1,000,000

Will give brainliest.

Answers

Answer:  1e+12

Step-by-step explanation:

Answer:

[tex]1000000 \times 1000000 \\ = 1000000000000[/tex]

It's 1 Million *1 Million

=1 Trillion (According to USA)

How much simple interest will sean earn of $200 if he invest it for 3 years at 8% interest? ​

Answers

Answer:

$48

Step-by-step explanation:

He will earn $16 interest for one year. After 3 years, that will triple to $48

It’s question 2
Help

Answers

Answer:

The answer to this one could be 8.2 for x

Step-by-step explanation:

Hope this Helped

X=27
137=5x+2
Subtract 2 from both sides
135=5x
135/5=27

The school principal wants to know whether the students in the entire school prefer football or basketball. The principal draws a random sample from the following groups: . All school teachers . All girls in each grade • All students in each grade • All students on the basketball team Which of the following groups best represents the population she should take a random sample from to get the best results for her survey? (1 point) 1) All school teachers 2) All girls in each grade 3) All students in each grade 4) All students on the basketball team​

Answers

Answer:

3

Step-by-step explanation:

because 3 includes everyone so it's not biased

Help me with this I don’t understand.

Answers

I have filled in the table...
Just make a story that saying something like you had $0 in the bank account so they subtracted 2 dollars each day
Something that showing the amount is decreasing day by day

3 5. The cost of a reserved seat is 1 3/4 times the cost of general admission. If a reserved seat is $14, what is the price of general admission.​

Answers

$14 / 1.75 = $8

General admission is $8

9.5 inches
sreball tournament and were awarded this trophy
4.0 inches
9.5 inches
What is the volume of the trophy? Let I 3.14. Round the answer to the nearest hundredth.
O A 543.15 in
OB. 172.97 in
O c. 733 32 in
OD 206.63 in

Answers

I think the answer would be D

The radius of a frisbee is 5 inches. What is the circumference of the frisbee in terms of (pi)?

Answers

Answer:

10π inches

Step-by-step explanation:

C = 2πr

C = 2π(5)

C = 10π ≈ 31.42

Based on her recipe, Elena knows that 8 servings of
granola have 1,600 calories.
1. If she eats 6 servings of granola, how many calories
does she eat?
2. If she wants to eat 300 calories of granola, how many
servings should she eat?
3. Write an equation to represent the relationship
between the number of calories and the number of
servings of granola.

Answers

Answer:

1. 1200

2. 1.5 servings

3. 1 serving= 200 calories.

Step-by-step explanation: 1600 divided by 8 is 200.

Functions A function is defined by the equation f(x) = 2x - 5​

Answers

2 x 1 is 2x -5 = 3 so you js subtract the 2 get 3x -5 = -2

Write each number in standard form.

7.3 × 10 -2

Answers

Answer:

10^-9

Step-by-step explanation:

Which of the following tables accurately represents the data shown in the bar graph?


Candy Number of People
Chocolate 10
Hard Candy 12
Chewy Candy 8

Candy Number of People
Chocolate 10
Hard Candy 12.5
Chewy Candy 8.5

Candy Number of People
Chocolate 10
Hard Candy 13
Chewy Candy 9

Candy Number of People
Chocolate 10
Hard Candy 14
Chewy Candy 10
NEXT

Answers

C

You just gotta read the graph. Chocalate is 10, Hard Candy is 13 and Chewy is 9

Answer:

it is actually b beacuse hard candy on the graph is 12.5 not 13!

Step-by-step explanation:

I dont want you guys to get it wrong so it is:B

HI would some one please help me !

Answers

Answer:

C) 4^2

Step-by-step explanation:

4^7 * 4^-5 = 4^(7-5) = 4^2.

If it is helpful, plz give me Brainliest.

Answer:[tex]4^{2}[/tex]

Step-by-step explanation:

Let's take our equation

[tex]4^{7}*4^{-5}\\[/tex]

Now subtract the exponents

[tex]7-5=2\\4^{2}[/tex]

djxjicjcjcicifiddiciicifididididjdjhhh​

Answers

Answer:

18

Step-by-step explanation:

Let the unknown number be = x

Then,

x + 16 = 34

=> x = 34 - 16

=> x = 18 (Ans)

The answer is 18. This is simple math.

i need the help alot​

Answers

Answer:

{-5/4, 8}

Step-by-step explanation:

We are given (4u + 5)(8 - u) = 0.  Solve for u by setting each of the factors (4u + 5) and (8 - u) equal to zero and solving each of the resulting equations:

4u + 5 = 0 leads to u = -5/4, and

8 - u = 0 leads to u = 8.

The solutions are {-5/4, 8}

Take y=1/x^2. Stretch it by a factor of 5, shift it 4 units to the right and 7 units down. What is the new function?

Answers

y=5(1/(x^2-4)-7)

Hope it helps

I will fail if I don’t get this done and it is so confusing. Math is just ending me right now. :(

Answers

What question do you need to get or is it all?

what are the values of x and y​

Answers

Answer:

x = 10, y = 12

Step-by-step explanation:

There is a 2:1 ratio between 16 and 8, alternate side lengths.

2x = 20

x = 10

2(6) = y

y = 12

- .... . / --. .. .- -. - / .... --- .-. ... . / -.-. --- -.-. -.- / .-- . .. --. .... - ... / --- ...- . .-. / .---- .---- / .--. --- ..- -. -.. ...

Which of the following are solutions to the equation below?
Check all that apply.
3x^2 + 10x-30 = x

Answers

Answer:

x1= -5

x2= 2

Step-by-step explanation:

Watch help video
A company sells widgets. The amount of profit, y, made by the company, is related to
the selling price of each widget, x, by the given equation. Using this equation, find out
the maximum amount of profit the company can make, to the nearest dollar.
y = -122? + 7182 - 5419
Answers
Suhmit Answer
a
W
NX

Answers

The answer is Y=-122?

help me find the answer, please!

Answers

Answer:

7/10

Step-by-step explanation:

Answer:

7/10

Step-by-step explanation:

Hey There!

there are a total of 10 balls and only 3 out of the ten are pink

so the probability of them picking a pink one is 3/10 and the probability of them not picking a pink one is 7/10

will give brainliest and five stars

Answers

Answer:

B

Step-by-step explanation:

4x + 8 is another way of saying

4(x) + 4(2)

Find the length of the missing side. Leave your answer in simplest radical form.

Answers

the answer is c !
9x9=81
4x4=16
c squared=97ft squared
c=9.84ft

63 : 21 = __ : 3


I need help pls a quick answer would be great. Thanks!

Answers

Answer:

9 : 3

Step-by-step explanation:

To get from 21 to 3 we divided 21 by 7, therefore we have to do the same to the other side and so we get...

63 / 7 = 9

Therefore 63 : 21 = 9 : 3

9! ratios can be found by dividing. 21 divided by 3 is 7. therefore, divide 63 by 7 and get 9. 63:21=9:3

Plz help 20 points dont just steal points plz

Answers

Answer:

71.13

Step-by-step explanation:

The half area of a circle is A = 1/2 * pi*r^2 = 1/2 * pi * 3^2 or 9

The trapezoid is a rectangle and a triangle. Rectangle is 8*6 and the triangle is 6*(11 - 8) * 1/2

The total is 1/2 * pi * 9 + 8*6 + 6*(11 - 8) * 1/2 = 71.13

AA, SSS, SAS, or not similar??

Answers

Answer:

C

Step-by-step explanation:

This is showing Side Angle Side congruency because first of all where the triangles connect shows vertical angles meaning that they are congruent

Second of all the triangle are similar because or proportions

[tex]\frac{9}{6} =1..5\\\frac{6}{4} =1.5[/tex]

they are both showing proportions of 1.5 therefore the sides are similar

What is the length of PR?
B
175"
75
5
55°
A
X

Answers

Answer:

C. 6

Step-by-step explanation:

Use the table below to determine the approximate height of the flag pole.

Answers

Answer:

B 17.5 ft

Step-by-step explanation:

tangent = opposite / adjacent

tan 35° = h / 25

multiply both sides by 25

h = 25 (tan 35°)

tan 35° = 0.70 (from your calculator)

h = 25 (0.70)

h = 17.51 ft.

8.
The Johnsons framed a family picture to hang on the wall. The perimeter of the frame is 72 inches. Use the formula P = 2ℓ + 2w to find the length of the frame if the width is 19 inches.


A. 15 in.

B. 17 in.

C. 20 in.

D. 19 in.

Answers

Answer:

B. 17 in.

Step-by-step explanation:

2l + 2w = 72

2l + 2(19) = 72

2l + 38 = 72

2l = 34

l = 17

Hope this helps!

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