The exact values of the trigonometric functions are:
tan (7π / 6) = √3 / 3
cot (7π / 6) = √3
sec (7π / 6) = - 2√3 / 3
csc (7π / 6) = - 2
How to find the exact values of trigonometric functions
The angle given in the statement can be represented in a goniometric circle by a ordered pair of the form (x, y) = (cos θ, sin θ) and the expressions of the derivated trigonometric functions can be found by means of the following definitions:
Tangent
tan θ = sin θ / cos θ
Cotangent
cot θ = cos θ / sin θ
Secant
sec θ = 1 / cos θ
Cosecant
csc θ = 1 / sin θ
First, find the exact values of the sine and cosine of the angle:
sin (7π / 6) = sin (π + π / 6) = sin π · cos (π / 6) + cos π · sin (π / 6)
sin (7π / 6) = - sin (π / 6)
sin (7π / 6) = - 1 / 2
cos (7π / 6) = cos (π + π / 6) = cos π · cos (π / 6) + sin π · sin (π / 6)
cos (7π / 6) = - cos (π / 6)
cos (7π / 6) = - √3 / 2
Second, calculate the exact values of the derivate trigonometric functions:
tan (7π / 6) = (- 1 / 2) / (- √3 / 2)
tan (7π / 6) = √3 / 3
cot (7π / 6) = √3
sec (7π / 6) = 1 / (- √3 / 2)
sec (7π / 6) = - 2√3 / 3
csc (7π / 6) = 1 / (- 1 / 2)
csc (7π / 6) = - 2
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Write a 3-digit number that can be divided by 3 but not by 10.
Answer:
Hi
999
Step-by-step explanation:
Please help meee I need this done ASAP
Answer:
4pi/15=θ - i think
Step-by-step explanation:
S = r*θ
r=9
s=12pi/5
12pi/5=9*θ
12pi/45=θ
4pi/15=θ
What is the answer to -3/7 ÷ 3/8 in simplest form?
please help me with math
Answer:
C. 1056 ft³
Step-by-step explanation:
V = Bh
V = 96 ft² × 11 ft
V = 1056 ft³
Maya planted sunflowers in the community garden. During her last visit to the garden, the plants were 80 inches tall. Today, Maya found them to be 15% taller. How tall are the sunflowers now?
The height of the sunflower is got increased by 15% will be 92 inches.
What is the percentage?The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates to one hundred percent. It is symbolized by the character '%'.
Maya established sunflowers locally garden. During her last visit to the nursery, the plants were 80 inches tall. Today, Maya viewed them as 15% taller.
The length of the sunflower will be given as,
⇒ 80 x (1 + 0.15)
Simplify the expression, then we have
⇒ 80 x (1 + 0.15)
⇒ 80 x 1.15
⇒ 92 inches
The height of the sunflower is got increased by 15% will be 92 inches.
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The following box plot shows the number of hours students have spent on math this week. what info can you get from this?
Answer: Choice A) Median is about 3
Explanation:
We can use a process of elimination to rule out the non-answers.
Choice B is false because the minimum is 0 hours, as indicated by the tip of the left whisker. So there are students who spent less than 1.875 hours doing math.Choice C is false because we don't have enough info to determine the mean. This is true of any boxplot. We would need the list of data values to be able to compute the mean. The boxplot can only tell us the five number summary which is: min, Q1, median, Q3, max.Choice D is false for similar reasoning discussed when eliminating choice B. The whiskers indicate that students spent less than 1.875 hours and more than 3.75 hours. The tip of the right whisker is cut off, so it's not clear where it ends. Luckily we don't need this info to eliminate choice D.All that's left is choice A. The median is the vertical line in the box. It's not always at the visual center. We don't have enough info to see what the median is based on just the boxplot alone. There aren't enough numbers along the horizontal scale. But a good guess of the median is some value between Q1 = 1.875 and Q3 = 3.75 so why not 3.
inverse of f(x) =e^2x- 4
Answer:
f−1(x)=ln(x+4)/ 2
Step-by-step explanation:
An object is moving at a speed of 2 centimeters ever 7 seconds. express this speed in meters per week.
The speed of the object is 12121 m per week.
What does it mean to do speed?
“Speed” is a street name for various stimulant drugs that teens, young adults and others use to feel more alert and focused, and in some cases, to feel high. Some people also use various forms of speed to reduce their appetite. Types of speed include: Amphetamines (used to treat ADHD, narcolepsy, and depression)The object is moving at a speed of 2 centimeters every 7 seconds.
We need to find the speed in m per week.
2 cm = 0.02 m
1 week = 604800 s
7 s = \(1.65 * 10^{-6} week\)
Speed = distance/time
So,
\(v = \frac{0.02 m}{1.65 * 10^{-6 } week}\)
\(v = 12121.21 m/ week\)
or v = 12121 m/ week
So, the speed of the object is 12121 m per week.
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The density function of the continuous random variable x, the total number of hours, in units of 100 hours, that a family runs a vacuum cleaner over a period of one year is given below: f(x) = { x, 0 < x < 1 8 − x, 1 ≤ x < 2 0, otherwise Find the average number of hours per year that families run their vacuum cleaners?
Answer:
1000 hours
Step-by-step explanation:
∫xf(x)dx = ∫x*xdx (1,0) + ∫x*(8-x)dx (2,1)
∫xf(x)dx = ∫x²dx (1,0) + ∫8x - x²dx (2,1)
∫xf(x)dx = ∫x²dx (1,0) + ∫8xdx (2,1) - ∫x²dx (2,1)
∫xf(x)dx = x³/3(1,0) + 8x²/2 (2,1) - x³/3(2,1)
∫xf(x)dx = 1/3 + 8(4/2 - 1/2) - (8/3 - 1/3)
∫xf(x)dx = 1/3 + 8(2-0.5) - (7/3)
∫xf(x)dx = 1/3 + 8(1.5) - 7/3
∫xf(x)dx = 1/3 + 12 - 7/3
∫xf(x)dx = - 6/3 + 12
∫xf(x)dx = - 2 + 12
∫xf(x)dx = 10
The average number of hours the family runs their vacuum cleaner in units of 100 hours
100 * 10 hours = 1000 hours
Kailynn has been on a roll, and solving 5 math problems every 2.5 minutes. At this rae, how many problem will she solve in 30 minutes.
Answer:
60 math problems.
Step-by-step explanation:
30/2.5=12
12*5=60
Find the surface area of the pyramid.
Answer:
319
Step-by-step explanation:
So, to find the surface area, first we find the base area, which is: 11 x 11 = 121
Then, we have to find the area of the other faces. Since each face is a triangle, we can use the formula A = 1/2 x b x h.
So,
b = 11
h = 9
1/2 x 11 x 9 = 49.5
The, we multiply by 4, the number of sides: 49.5 x 4 = 198
Then, we add the 2, values: 121 + 198,
Which gives us: 319.
Hope this helped!
PLEASE HELP URGENT EASY PLEASE HELP PLS
The angles that are supplementary angles are ∠ONK and ∠ONP
Supplementary anglesFrom the question, we are to determine which of the given angle pairs are supplementary
Supplementary angles are angles whose measures sum up to 180°.
Supplementary angles form a straight line.
In the given diagram,
∠ONK and ∠MNP are not supplementary, they are vertically opposite.
∠ONK and ∠JKN are not supplementary, they are alternate angles.
∠ONK and ∠LKI are not supplementary, they are corresponding angles.
∠ONK and ∠ONP are supplementary, they form a straight line.
Hence, the angles that are supplementary are ∠ONK and ∠ONP
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what is 72 percent of 30
Answer:
72% of 30 is 21.6
Step-by-step explanation:
Write 72/100 as a fraction, then multiply it by 30.
72/100 X 30 = 21.6
Calucator 72 ÷ 100 x 30 = 21.6
72 percent of the value 30 will be: \(\frac{18}{25} * 30 = 21.6\) we get this value by using fraction method.
What are fraction?A fraction represents a whole object or part of a collection. A fraction consists of two parts. The number at the top of the line is called the counter. Indicates how many equal parts of the whole or collection are taken. The number below the line is called the denominator. This gives the total number of equal parts divided into a whole, or the total number of equal objects in a collection.
If you divide the whole evenly, the number of parts will be a fraction.
If you divide the pie into 8 halves and place one of them on a plate, each plate is said to contain one-eighth of his pie. It is read as "one eighth" or "one times eight".
We know that:
4% of a number = \(\frac{1}{25}\)
therefore 4*18 = 72% of the same number will be: \(\frac{18}{25}\)
So we can say that \(\frac{18}{25} * 30 = 21.6\)
So the value of 72% of thee number 30 will be: 21.6
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Evaluate the expression using x=-1 and y=3 (6^4y^3)
The value of the expression when evaluated is: 162.
How to Evaluate an Expression?To evaluate the expression, 6x^4y^3, substitute x = -1 and y = 3 into the expression and solve.
6(-1^4) × 3^3
6(1) × 27
6 × 27
162
The value of the expression, 6x^4y^3, is: 162.
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A study showed that low-intensity vibration therapy reduces pain levels in patients with fibromyalgia. During each session in the study, vibration pads were placed on the pain
site indicated by the patient. Pain reduction was measured through self-reporting after each session.
Another study is being designed to examine whether low-intensity vibration therapy also reduces pain in patients suffering from ruptured disks in the lumbar region of the back.
Three hundred male patients are subjects in the new study.
Part A: What is an appropriate design for the new study? Include treatments used, method of treatment assignment, and variables that should be measured. (4 points)
Part B: If the study consisted of 150 male and 150 female patients instead of 300 male patients, would you change the study design? If so, how would you modify your design
? If not, why not? (4 points)
Part C: Could your design be double-blind? Explain. (2 points)
A study showed that low-intensity vibration therapy reduces pain levels in patients with fibromyalgia. What is an appropriate design for the new study? If the study consisted of 150 male and 150 female patients instead of 300 male patients?, as well as Could your design be double-blind? are explained as
1) To get around the placebo effect, it is recommended that vibration pads be applied to the area of discomfort and that pain be measured objectively using instruments, rather than via subjective reporting. Time spent in treatment, preexisting pain levels, post-vibration pain levels throughout the day, and total daily pain intensity should all be tracked, as well as the individuals' ages.
2) To avoid any potential bias in the findings, we would split the sample evenly between male and female individuals (150 total) and use them in both the control and experimental groups (150 total).
3) Since the placebo effect may be introduced by revealing to either the subjects or the experimenters which group each individual is a part of, our design would indeed be double-blind.
What is a medical study?Generally, a medical study is simply defined as A medical study is a trial used to evaluate the efficacy, safety, and effectiveness of potential treatments.
Medical studies are very constrained and hidden from the public eye until results are in
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Factor the polynomial 4x4 – 20x2 – 3x2 15 by grouping. What is the resulting expression?.
Answer:
\(=-669\)
Step-by-step explanation:
\(4\cdot \:4-20\cdot \:2-3\cdot \:215\)
\(\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}\)
\(4\cdot \:4=16\)
\(=16-20\cdot \:2-3\cdot \:215\)
\(20\cdot \:2=40\)
\(=16-40-3\cdot \:215\)
\(3\cdot \:215=645\)
\(=16-40-645\)
\(16-40=-24\)
\(=-24-645\)
\(-24-645=-669\)
\(=-669\)
Answer:
(4x^2 – 3)(x^2 – 5)
Step-by-step explanation:
Dinner Bill- $28.15, Tax- 8%, Tip- 15% What is the final cost.
Miles is saving to buy a new car. He currently has $600 in his savings account. He plans on depositing $200 a month until he has saved the $2000 he needs to buy a car. Rate change?
Answer:
7 months
Step-by-step explanation:
He plans on depositing $200 every month into the savings account that already has $600 in it.
We can represent the amount of money he will have after a certain number of months (x) as:
A = 600 + 200x
He needs to save $2000. Therefore, to find the months he needs to save, we need to find x when A is $2000:
2000 = 600 + 200x
200x = 2000 - 600
200x = 1400
x = 1400/200 = 7 months
He needs to save for 7 months.
The number of boys in a school class is given by x+6 The number of girls is given by x-y. What expressions represent the total number of students?
Answer:
x+6+x-y = 2x-y+6
Step-by-step explanation:
Write an equation that describes the following relationship: y varies inversely as the fourth power of u and when x = 2,y=7.y =
Given:
y varies inversely as the fourth power of x
For the inversely forth power of x is:
\(y\propto\frac{1}{x^4}\)So the value of y is:
\(y=\frac{k}{x^4}\)where,
k = constent
so the value of k is x=2 and y = 7.
\(\begin{gathered} y=\frac{k}{x^4} \\ 7=\frac{k}{2^4} \\ k=7\times2^4 \\ k=7\times16 \\ k=112 \end{gathered}\)Then the function is:
\(y=\frac{112}{x^4}\)Can someone explain and give me the answers ty
The expression evaluates to 20
We have : 5 |3-7|
We have to evaluate above expression.
State the property Modulus of the function - F(x) = x.For a function f(x) = x, which is real in nature -
f(x) = |x| = \(\left \{ {{-x\;\;\;for\;x < 0} \atop {x\;\;\;for\;x > 0}} \right.\)
The above property is called Modulus property. It is used to find the absolute value or magnitude of a quantity.
In the question it is given -
5 |3-4|
5 |3 - 4|
5 x 4 = 20 {Using the property of modulus f(x) = - x for x < 0}
Hence, the expression evaluates to give an absolute value of 20
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A-B =2
A+2= B
What is A and B
Answer: No Solutions
The system is inconsistent.
======================================================
Explanation:
A+2 = B is the same as B = A+2
We can replace B with A+2 in the first equation and solve for "A" like shown below.
A-B = 2
A-( B ) = 2
A - (A+2) = 2
A-A-2 = 2
0A-2 = 2
0-2 = 2
-2 = 2
We run into a problem. The "A" variable cancels out and the left hand side does not match with the right hand side. We get a contradiction.
No matter what we pick for A and B, there aren't any solutions to this system. We consider this system inconsistent.
--------------------------------
Another approach:
Rearrange the terms of A+2 = B to get A-B = -2
The original system of
\(\begin{cases}A-B = 2\\A+2 = B\end{cases}\)
turns into
\(\begin{cases}A-B = 2\\A-B = -2\end{cases}\)
Now let C = A-B, so we can replace each "A-B" with C.
The system now updates to
\(\begin{cases}C = 2\\C = -2\end{cases}\)
But it's impossible for a variable to take on more than one value at a time. C is not able to be equal to both 2 and -2 at the same time. This is another way to arrive at a contradiction which leads to "no solution".
--------------------------------
A third approach:
Replace each "A" with x. Replace each "B" with y
A-B = 2 becomes x-y = 2 and solves to y = x-2A+2 = B becomes x+2 = y which is the same as y = x+2If you were to graph those linear equations, then you should see parallel lines forming. Parallel lines never intersect. We would need them to intersect to form a solution (x,y). This is a visually quick way to see this system has no solutions.
Notice that y = x-2 and y = x+2 have the same slope m = 1, but different y intercepts.
Find the cost of 17/15 meters of cloth at $147/4 per meter help pls
Answer:
$2499/20 or $124.95
Step-by-step explanation:
Here the cloth of cost per meter is $147/4
and the cost of 17/5 meters of cloth is (147/4)×(17/5) (147*17)/(4*5)
2499/20 or 124.95
hence the cost of 17/5 meters is $2499/20 or $124.95
which angles form a linear pair giving brainliest and points
Angles 6 and 8 are adjacent, they are Linear pair οf angles.
What is Linear pair?Linear pair οf angles are fοrmed when twο lines intersect each οther at a single pοint. The angles are said tο be linear if they are adjacent tο each οther after the intersectiοn οf the twο lines. The sum οf angles οf a linear pair is always equal tο 180°. Such angles are alsο knοwn as supplementary angles.
Angles 1 and 4 are not adjacent, they are vertically opposite.
Angles 5 and 8 are not adjacent, they are vertically opposite.
Angles 6 and 8 are adjacent, they are Linear pair οf angles
Angles 1 and 5 are corresponding exterior angle, so the are not linear pair.
Thus, Angles 6 and 8 are adjacent, they are Linear pair οf angles
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y+4=2(x+5)
what is the slope?
what is the point ( in the equation ) that the line passes though?
Answer:
y= 2x+6
y= x+3
1 Is slope
3 is y intercept or the line that it passes through
25x2 – 9y2
Factories
Answer:
Step-by-step explanation:
25x^2-9y^2
=(5x)^2-(3y)^2
=(5x-3y)(5y+3y)
Answer:
=2(25×-9y) okay na po bayan
Convert 5 1/6 to a decimal through long division.
Answer:5.83
Step-by-step explanation:
What is the sum of the measures of the exterior angles of a regular dodecagon? If necessary, round to the nearest tenth.
Step-by-step explanation:
Exterior angle of a dodecagon (12-sided regular polygon) is supplementary to its interior angle.
Sum of all interior angles of
N
-sided regular polygon equals to
(
N
−
2
)
⋅
180
o
.
Therefore, sum of interior angles of
12
-sided polygon is
(
12
−
2
)
⋅
180
o
=
1800
o
All 12 interior angles of dodecagon are equal, so each is
180-30
150
A supplementary exterior angle, therefore, equals to
180-150
=30
hopeit helps..
Answer
The measure of each exterior angle of a regular dodecagon is 30 degrees.
What is a regular dodecagon?A regular dodecagon is a 12-sided regular polygon with each side equal.
We are asked to find the measure of each exterior angle of a regular dodecagon.
We know that measure of each angle of n-sided regular polygon can be found using
= 360/n
Upon substituting n = 12 in above formula, we will get:
= 360 / 12
= 30
Therefore, the measure of each exterior angle of a regular dodecagon is 30 degrees.
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Find a positive value of k for which y=.cos(kt) satisfies dy^2/dt^2 + y = 0.
For `k = 1`, the given differential equation ` is satisfied. Given that we need to find a positive value of k for which `dy^2/dt^2 + y = 0`.
Given `y = cos(kt)`
The first derivative of y with respect to t is:`
dy/dt = - k sin(kt)
`The second derivative of y with respect to t is:
`d^2y/dt^2 = - k^2 cos(kt)`
Now, substituting these two values of dy/dt and d^2y/dt^2 in the given equation, we get:`
d^2y/dt^2 + y
= -k^2 cos(kt) + cos(kt)
= 0
`We can write the above equation as:`
(1 - k^2)cos(kt) = 0`
For the above equation to be true, we must have either
`(1 - k^2) = 0` or `cos(kt) = 0`
Hence, if `(1 - k^2) = 0`, then `k = 1`.
Therefore, the value of k for which `dy^2/dt^2 + y = 0` is true is `
k = 1`.
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help me yo!
A bag held 2 orange marbles, 3 black marbles, and 5 pink marbles. I drew a pink marble and did not replace it. What is the probability of drawing a pink marble next?
A) 2/5
B) 4/9
C) 1/2
D) 5/9
A bag held 3 white marbles, 1 orange marble, and 2 green marbles. Anna drew a white marble and did not replace it. What is the probability of drawing a green marble next?
A.) 1/6
B.) 1/5
C.) 1/3
D.) 2/5
A locker combination has three nonzero digits, and digits cannot be repeated. If the first digit is 3, what is the probability that the next digit is odd?
A.) 4/9
B.) 1/5
C.) 1/2
D.) 5/9
My locker combination has three digits. None of the digits are zero. What is the probability that the first digit of my locker combination is less than 4?
A.) 3/10
B.) 1/3
C.) 2/5
D.) 4/9
Answer:
1 is B 2 is D
Step-by-step explanation:
5+3+2=10
but since you took a pink one out its now 9 you also need to subtract 1 from the 5 since you didn't replace it
so your chances of getting a pink one are 4/9