Suppose Sine (x) = four-fifths and cos(x) < 0. What is the value of cos(2x)?
Negative StartFraction 14 Over 25 EndFraction
Negative StartFraction 7 Over 25 EndFraction
StartFraction 7 Over 25 EndFraction
StartFraction 14 Over 25 EndFraction
Answers
Answer:
B.-7/25
Step-by-step explanation:
edge
The required value of cos(2x) is -7/25. Option B is correct.
sinx = 4/5
cosx < 0
Trigonometry is the study of angles in mathematics.
Here,
cos(2x) = 1-2sin²x
= 1 - 2 x 4²/5²
= 1 - 32/25
cos(2x) = -7/25
Thus, the required value of cos(2x) is -7/25.
Learn more about trigonometry here:
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Related Questions
. If m∠1 = 50°, find the following: a. m∠2 = ? b. m∠3 = ? c. m∠4 =
Answers
Answer: is there a graph
Step-by-step explanation:
3x – 1 = 2(x + 34)
what is the answer in feet and inches?
Answers
Answer:
inches:-69
feet:-5 9/12 (-5 3/4 simplified)
Step-by-step explanation:
Write out the equation and distribute.
3x – 1 = 2(x + 34)
3x - 1 = 2x + 68
Get rid of the variable on one side first (it makes solving the equation less complicated.)
3x - 1 = 2x + 68
-3x -3x
-1 = -x + 68
Subtract 68 on both sides.
-1 = -x + 68
-68 -68
-69 = x
I'm guessing that the answer in feet and inches would be...
inches:-69
feet:-5 9/12 (-5 3/4 simplified)
I'm not sure how feet and inches can be negative, but that's what I got for the answer...hope this helps! Have an amazing day C:
A plane flew 720 miles in 6 hours. How many miles did the plane fly in 4 hours?
Answers
Answer:
[tex]\huge\boxed{\texttt{480 miles}}[/tex]
Step-by-step explanation:
We can create a ratio here to find the constant of proportionality and use that to find how many miles the plane flew in 4 hours.
We know the plane flew 720 miles in 6 hours. We can create a ratio, represented as a fraction, in the form [tex]\frac{miles}{hours}[/tex] .
[tex]\frac{720}{6}[/tex]
We can now make another ratio where we use a variable for the miles flown in 4 hours.
[tex]\frac{x}{4}[/tex]
Since the ratios are equal, we can create an equation.
[tex]\frac{720}{6}=\frac{x}{4}[/tex]
To find the value of x, let's cross multiply.
[tex]720 \cdot 4 = 2880\\\\2880\div 6 = 480[/tex]
So the plane flew 480 miles in 4 hours.
Hope this helped!
p(x)=6x-5. p(x)=13 what is x?
Answers
Answer:
x=3
Step-by-step explanation:
Answer:
x = 3
Step-by-step explanation:
p(x) = 6x - 5 but p(x) = 13
=> 6x - 5 = 13
<=> 6x = 18
<=> x = 18 : 6 =3
The graph of y = f(x) is shown. Choose all the true statements.
−2 is a member of the domain of f.
−2 is a member of the range of f.
f(0) > 0
f(2) > 2
Answers
Answer:
−2 is a member of the domain of f.
f(0) > 0
Step-by-step explanation:
Statement 1 is TRUE. Domain value includes set of values of x of the function. -2 is plotted on the x-axis on the graph. Therefore, it is a member of domain of f.
Statement 2 is incorrect. Range includes all possible y-values of the function. On the graph, no y-value plotted is -2. Therefore, -2 is NOT a member of the range of f.
Statement 3 is TRUE.
f(0) is approximately 2.2 on the graph. i.e. at x = 0, y ≈ 2.2.
Therefore, f(0) > 0.
Statement 4 is INCORRECT.
f(2) = 1, that is at x = 2, y = 1 as seen in the graph. Therefore, f(2) is not greater than 2.
write the question of a line perpendicular to y=2x-5 that passes through point (2,-5)
Answers
Answer:
Can you guys please help me?
Step-by-step explanation:
You guys seem to be older so may you please help?
I am young and in 7th grade so my problems shouldn't be that hard.
1) Find the GCF of the pair of Numbers
24 and 60
Answers
Answer:
12
Step-by-step explanation:
bruh i searched it up
Answer:
12
Step-by-step explanation:
Hank wants to add a row of tile to his kitchen wall. The space is 5.75 feet long. He plans to put a \frac {3}{4} 4 3 –foot yellow tile in the center. He'll fill the rest of the space with blue tiles that are 3 inches long. How many 3-inch blue tiles will he need?
Answers
Answer:
He will need 20 3-inch blue tiles
Step-by-step explanation:
Here, the total space to fill is a length of 5.75 ft
The tiles to place at the center has 3/4 ft which is same as 0.75 ft
The length left unfilled will be 5.75 - 0.75 = 5 ft
Now we want to know the number of 3 ft tiles needed to fill up this length;
Mathematically, we know that
1 ft = 12 inches
So 5 ft will be 5 * 12 = 60 inches
So the number of 3 inch tiles needed to fill this length will be 60/3 = 20 tiles
Can anyone help me with this?
Answers
Answer:
They all have the same degrees
Step-by-step explanation:
1. Which Statement is NOT true? *
7
A 0.037 >
2000
7
B 3.2 x 10-3
2000
C 3.2% > 3.2 x 10-3
D 3.2% > 0.037
ОА.
B.
OD
Answers
Which of the following number is between 5 and 10 on a number line
[tex] \sqrt{44} [/tex]
[tex] \sqrt{38} [/tex]
[tex] \sqrt{21} [/tex]
[tex] \sqrt{6} [/tex]
[tex] - \sqrt{59} [/tex]
[tex] - \sqrt{8} [/tex]
Answers
The first, second, and fifth one
Answer:
first second and fifth are the answers
Plot the image of the triangle ABCD under a reflection across the Y-axis
Answers
Answer:
Please provide an image or points to plot
P = a + b + c; solve for b
Answers
Answer:
b = P - a - c
Step-by-step explanation:
Step 1: Write equation
P = a + b + c
Step 2: Solve for b
Subtract a on both sides: P - a = b + cSubtract c on both sides: P - a - c = bRewrite: b = P - a - cmaria has three more than twice as many crayons as elizabeth
Answers
Answer:
You did not provide your whole question?
Step-by-step explanation:
Elizabeth has 4 crayons
Jordan created a scale drawing of a rectangular room. The drawing is 8 inches long by 6 inches wide. He used a scale of 1 inch - 3 feet. What is the area, in square feet,
Answers
Answer: 144 feet
Step-by-step explanation:
Well solving for area you multiply length times wedth. So multiply 8 and 6 to get 48. Now you have to convert 48 inches into feet. So just multiply 48 times 3 to get 144.
Help Me Please This Was Due Saturday The 25th!
Answers
Answer:
the last box is 3
Step-by-step explanation:
Answer: 4
Step-by-step explanation: If you multiply 3/5 by 3/3, it will turn into 9/15. If you multiply -1/3 by 5/5, it will turn into -5/15. Since it is a negative, you will have to subtract. 9-5 is 4.
Ok this is my last math question so help me out here
Answers
Answer:
its 6
Step-by-step explanation:
54:20
During a football game, a team lost 9 yards on the first play, then gained 3 yards on each of the next 3 plays. Which
integer represents the total number of yards at the end of the first four plays?
-3
09
18
Mark this and return
Save and Exit
Submit
Answers
Answer:
the answer is actually 0
Step-by-step explanation:
Harper wants to buy a car that costs $28,350.
She has saved 1/10 of the cost of the car.
How much has she saved?
Answers
Answer:
2835
Step-by-step explanation:
given angle 1 is congruent to angle 2 and angle 3 is congruent to angle 4 prove p is parallel to r
Answers
Thank you if you could help!
Answers
Answer: 12/8
Step-by-step explanation:
Answer:
[tex]\frac{3}{2}[/tex]
Step-by-step explanation:
Simplify: [tex]\frac{5}{8} - (-\frac{7}{8}) = \frac{5}{8} + \frac{7}{8}[/tex] [tex]\frac{5}{8} + \frac{7}{8} = \frac{12}{8}[/tex] [tex]\frac{12}{8} = \frac{3}{2}[/tex]I hope this helps!
Renee hiked for 6
miles. After resting. Renee hiked back along the same route for 5
miles. How many more miles does Renee need to hike to return to the place where she
started? Represent your answer as a simplified mixed number, if necessary.
Renee still needs to hike
miles
Answers
Answer:
1 mile
Step-by-step explanation:
Renee hikd 6 miles, then went back 5. 6-5=1
A flea, usually less than an eighth of an inch long, can long jump about eight inches. If humans
could jump in proportion to the flea, it would only take nine leaps to go one mile! At this rate, how
many leaps would it take a human to travel 693 miles from Louisville, Kentucky to Norfolk,
Virginia?
Answers
Answer:
6237
Step-by-step explanation:
693 multiplied by 9 is 6237
(oeerivona, please help me! quick!)
which angles of transformed figures have the same measure as ∠c in figure ABC?
Answers
Answer:
All of them
Step-by-step explanation:
It looks like the transformations that occurred here are reflections, translations, and rotations which are all rigid transformations. Rigid transformations conserve the angle measurements and side lengths of the corresponding image to the original one.
Which inequality best represents that ice cream at 2- C is cooler that ice cream at 4 C
A.-2 C 4C
B.-2 C > 4C
C.-4 C> 2C
D.-4 C<-2C
Answers
Answer:
the answer is 2 4 c is the of cooler
What is 6,780 divided by 10
Answers
Answer:
the answer is 678
Step-by-step explanation: a little trick you can do is if there is a zero at the end of a number and your dividing just remove the 0. Or just do 6780/10
A square patio has an area of 136 square feet. How long is each side of the patio to the nearest tenth?
Answers
Answer:
11.7
Step-by-step explanation:
Answer:
11.7 feet
Step-by-step explanation:
Area finds the length times the width (LxW). In other words, area is how long the first side is multiplied by how wide the second side is. If A=LxW, and we know A is 136, then we know that 136=LxW. This alone isn't enough to find L and W. However, we do know that the patio is a square. Squares have equal sides, so L and W will be the same number. Basically, you need to find the number that equals 136 when it's multiplied by itself. X multiplied by X needs to be 136. You can do this easily with a calculator, if you're allowed to have one. just use the square root function on 136, and be sure to round your answer. If you're not allowed to use a calculator, it's a bit more trial-and-error. Try to see what numbers multiplied by themselves get close to 136, and narrow it down from there (ex. if 11 is too little and 12 is too much, the answer is between 11 and 12). You can also look up video tutorials for how to find a square root without a calculator, or use other study platforms. I hope this helps, and feel free to ask me any questions!! :)
please help me :( i really dont wanna fail
Answers
Answer:
Domain:
Jan,Feb,Mar,Apr
Range:
28,29,30,21
Not a Function because there is more than one output for a given input.
Step-by-step explanation:
domain=x
range=y
Identify the x and y intercepts of the equation. If there are no intercepts, write none. If its linear, find the slope. If its not linear, say not linear. y=4.5
Answers
Answer:
x-intercept: none
y-intercept: 4.5
linear
slope: 0
Step-by-step explanation:
36= 2² x 3² how do i get the number to my prime factor
Answers
Answer:
add up the exponents on each prime number
Step-by-step explanation:
2^2= 2x2
3^2=3x3
so 36=2^2x3^2=2x2x3x3
Answer:
3
Step-by-step explanation:
36
| \
18 2
| \
9 2
| \
3 3