Solve the equation for x:
sin^2 x – 2 cos x - 2 = 0
for the restriction 0 < x < 2pi
Answers
Answer: x = pi
sin²x - 2cos x - 2 = 0
⇔ 1 - cos²x - 2cos x - 2 = 0
⇔ cos²x + 2cos x + 1 = 0
⇔ (cos x + 1)² = 0
⇒ cos x + 1 = 0
⇔ cos x = -1
⇒ x = pi + k2pi
because 0 ≤ x < 2pi
=> x = pi
Step-by-step explanation:
Related Questions
Solve: -3+ h = 40
HELPPP
Answers
Answer:
answer: c, 43
Step-by-step explanation:
-3+h=40
+3 +3 add 3 to both sides
h=43
Answer:
Its c
Step-by-step explanation:-3 + h = 40 cause 43 -3 is 40
The system of equations is graphed on the coordinate plane.
y=-5/3x+3
y=1/3x - 3
Enter the coordinates of the solution to the system of equations
in the boxes.
Answers
Answer: The solution is (3, -2)
This means that x = 3 and y = -2 pair up together.
=====================================================
Explanation:
The solution is where the two lines cross. Note if we started at the origin (0,0) and moved to the right 3 units, and then down 2 units, we would arrive at the location (3, -2).
-----------------
As a way to check, we can plug x = 3 into each equation. We should get y = -2 as a result for each equation
y = (-5/3)x + 3
y = (-5/3)*3 + 3
y = -5+3
y = -2
The first equation is confirmed. Let's check the second equation
y = (1/3)x - 3
y = (1/3)*3 - 3
y = 1 - 3
y = -2
Both equations have the y value equal -2 when x = 3. Therefore, the overall solution is confirmed.
pls help me im so not smart lol
Answers
Answer:
7
Step-by-step explanation:
1 x 3=
2x3=6
4x3=12
7x3=21
Answer:
7
Step-by-step explanation:
im not that smart either but i think tis the 3s
1 x3 = 3
2 x3 = 6
4 x3 =12
7 x3 = 21
if tht makes any sense
Plz help. Will give brainliest
Answers
Answer:
So is there are 10 cats for every 4 dogs,
If there are 5 cats that is half of 10 so half of 4 is 2
Now there are 32 dogs that is 8 times more than 4 so 10 x 4 is 40 so the answers are
Cats 10 5 8
Dogs 4 2 32
Plz give brainiest
solving equation with integers add/sub
Answers
X+7=2
X=2-7
X=-5
i need help,Thats all
Answers
Answer:
we all need help sometimes
Step-by-step explanation:
New reported cases in New York state sinc 1999..Y is the represents the number of new cases....Find project cases since 2011
Answers
Answer:
where is the photo?
Step-by-step explanation:
Can someone please answer my last geometry question?
in the meanwhile, you can have these points
how's your day btw?
Answers
Answer:
Its good and yours? ill try to answer ur question i might not know lol
Step-by-step explanation:
Answer:
hello
Step-by-step explanation:
The table shows information about all students doing GCSE's at a school.
Year 10 Year 11 Total
Girls: 90 60 150
Boys: 60 80 140
Total: 150 140 290
What fraction of the boys are Year 11?
Give your answer in its simplest form
Answers
Answer:
[tex] \frac{1}{2} [/tex]
Step-by-step explanation:
[tex] \frac{130}{260} = \frac{1}{2} [/tex]
The fraction of the boys of Year 11 is 1/2.
What is a fraction?Fractions are used to represent smaller pieces (or parts) of a whole.
Given that, there are total 260 students of 11 years in which 130 are girls and 130 are boys.
The fraction of boys of 11 years = 130/260 = 1/2
Therefore, half of the strength of students are boys.
Hence, The fraction of the boys of Year 11 is 1/2.
For more references on fractions, click;
https://brainly.com/question/10354322
#SPJ2
help me for brainlist
Answers
Answer:
1. g. $0.10 per square inch
2. b. $0.08 per square inch
3. f. $10
4. m. $8
5. h. 79 in²
6. j. 113 in²
Step-by-step explanation:
1. A = πr²
r = diameter ÷ 2 = 10 ÷ 2 = 5
A = π(5)² = 25π in² ≈ 78.53981
$8.00/25π = $0.10 per square inch
2. A = πr²
r = diameter ÷ 2 = 12 ÷ 2 = 6
A = π(6)² = 36π in² ≈ 113.0973355
$10.00/36π = 0.088419 = $0.09 per square inch
3. information/answer was provided
4. information/answer was provided
5. A = πr²
r = diameter ÷ 2 = 10 ÷ 2 = 5
A = π(5)² = 25π in² ≈ 79 in²
6. A = πr²
r = diameter ÷ 2 = 12 ÷ 2 = 6
A = π(6)² = 36π in² ≈ 113 in²
Help ASAP!!!
Which of the following statements are true for the transformation of the pre image to the Image? Choose all that apply. There is more than one correct answer. Write the answer as just the
letters, for example if you think the first 2 equations are correct write A,B.
A) The transformation is a rotation 180 degrees counterclockwise
B) The transformation is a refection over the x axis
C) The symbolic representation is (X,Y)->(-x, -y)
D) The symbolic representation is (x,y)->(x-3,y-5)
Answers
Answer:
i cant see it
Step-by-step explanation:
50% to 36.75 what is the original price
Answers
Answer: 73.50
Step-by-step explanation:
I am assuming that the new price is 36.75
50% is 1/2
36.75·2=original price
original price=73.50
Recall that the center of dilation is point J. On the logo, identify one or two line segments: that contain the center of dilation that do not contain the center of dilation that lie on a line that passes through the center of dilation Record the names of the line segments you identified and the category they belong to. What differences do you notice in the way these categories of line segments are mapped from the preimage to the image?
PLATO
Answers
Answer:
HA , LJ , and IK contain the center of dilation. Line segments that contain the center of dilation in the preimage also contain the center of dilation in the image. GF , HI , and KL do not contain the center of dilation. Line segments that do not contain the center of dilation in the pre image are mapped onto distinct lines parallel to the original, corresponding line segment. HL does not contain the center of dilation either but it does lie on a line that passes through the center of dilation. Line segments that lie on lines passing through the center of dilation in the preimage lie on the same lines in the image.
Step-by-step explanation:
Plato’s Answer
Answer:
Step-by-step explanation:
HA , LJ , and IK contain the center of dilation. Line segments that contain the center of dilation in the preimage also contain the center of dilation in the image. GF , HI , and KL do not contain the center of dilation. Line segments that do not contain the center of dilation in the pre image are mapped onto distinct lines parallel to the original, corresponding line segment. HL does not contain the center of dilation either but it does lie on a line that passes through the center of dilation. Line segments that lie on lines passing through the center of dilation in the preimage lie on the same lines in the image.
What is the area of the triangle in the diagram?
Answers
Answer:no idea mate sorry
Step-by-step explanation:
If p + q has a value that is exactly 1/3 less than p, what is the value of q
Answers
Answer:
- ⅓
Step-by-step explanation:
p + q = p - ⅓
q = (p - p) - ⅓
q = - ⅓
In basketball, each shot made is worth 1, 2, or 3 points. Miles scored a total of 27 points in his most recent game. He made three 1-point shots
and four 3-point shots.
How many 2-point shots did he make?
Answers
Answer:6
Step-by-step explanation:
Subtract the three 1 point shots
Subtract the four 3 point shots
You are left with 12, and you split that in 2 because they're 2 point shots.
Derrick buys $14 more in groceries this week than he did last week. If he spent $76 this week, how much
money did he spend last week?
Answers
Answer:
62?
Step-by-step explanation:
I just subtracted 76 and 14, I don't know if i'm right
Find the slope and the y intercept of the chart
Answers
[tex]\frac{y_{2} - y_{1}}{x_{2} - x_{1}}[/tex]
[tex]\frac{1 - 4}{0 + 1}[/tex]
[tex]\frac{-3}{1}[/tex]
the slope is -3
y intercept is 1
y = -3x + 1
hope this helped :))
What is the equation of the graph?
Answers
help hurry pls i’ll cashapp you
Answers
-4 -7 = -11
-8i + 2i = -6i
Hope this helps
Which two ratios represent quantities that are proportional?
Answers
Answer:
D. 45/18 = 35/14Step-by-step explanation:
Lets simplify the ratios where possible and compare:
A. 3/4 = 9/12 ≠ 5/12B. 32/20 = 16/10 ≠ 22/10C. 7/5 = 14/10 ≠ 14/9D. 45/18 = 5/2 (divide by 9) and 35/14 = 5/2 (divide by 7)The last two ratios represent proportional quantities
Help me asap pleaseee I need y’all help
Answers
Length is just numbering each square and adding them up
Answer:{ x,y } = { - 2, - 3 }
Step-by-step explanation: 4x = 2y - 2
x = y/2 - 1/2
3. (y /2 - 1/2 ) + 2y = - 12
7y/2 = - 21/2
7y = - 21
x = y/2 - 1/2
y = - 3
x = (/2) ( - 3 ) - 1/2 = - 2
2/3 x + = 15
solve the following equation
Answers
Answer:
26wb trial corp Cisco soap
question 2 on plato geometry 2 70 points
To explore relationships among the sides and angles, move points B and C so that m∠CFB equals 45°, 50°, 60°, and 75°, successively. Measure the values listed in the tables to two decimal places. (It’s acceptable if the radius of the circle changes as you move B and C.)
picture below
Answers
Answer:
m∠CFB m∠CAB m∠EAD m ∠CAB + m∠EAD
45° 19.93° 70.07° 90°
50° 29.91° 70.09° 100°
60° 49.92° 70.08° 120°
75° 79.92° 70.08° 150°
m∠CFB BF CF DF EF BF + DF CF + EF BF × DF CF × EF
45° 2.69 2.74 9.09 8.91 11.78 11.65 24.45 24.41
50° 3.7 3.63 8.07 8.23 11.77 11.86 29.86 29.87
60° 5.35 4.72 6.42 7.28 11.77 12.00 34.35 34.36
75° 7.3 5 4.47 6.52 11.77 11.52 32.63 32.6
Step-by-step explanation:
edmentum
Answer:
PLATO
Step-by-step explanation:
y = 2x + 4
y = 3x + 6
Solve for x
Answers
Answer:
(-2,0)
Step-by-step explanation:
What value of x is in the solution set of -5x – 15 > 10 + 20%?
-2
-1
0
1
Answers
Answer:
-1
Step-by-step explanation:
-5x – 15 > 10 + 20x
-5x -20x > 10+15
-25x > 25
x < -1
If p:q=2/3:2 and p:r=3/4:1/2, calculate the ratio p:q:r
Giving your answer in its simplest form. Thx and God Bless.
Answers
Answer:
i did dude.may God bless you.sorry.l
on a map the scale is 1 inch=350 miles. what is the distance between two cities if the map distance is 2.5 inches
Answers
Answer: 875
Step-by-step explanation:
You can set up proportions so it’s like: 1/350=2.5/x and then solve for x
Help on this math problem pls!
Answers
Answer:
y=5
Step-by-step explanation:
x+3=2x+1
x=2
y=2+3
y=5
Find the area of a circle with a diameter of 2 feet. Use 3.14 for π.
Answers
The area of the circle will be 3.14 feet .
Find the area of a circle with a diameter of 2 feet. Use 3.14 for π.
Answer:-★Given,
→ Diameter = 2 feet
→ Circumference = 2/2 = 1 feet
★Now,
→Area of a circle = πr²
→ = 3.14 × 1 × 1
→ = 3.14 feet
Hence , the circumference is 3.14 feet.