If cos(x)=-4/5 in quadrant II then determine the following sin(x/2),cos(x/2),tan(x/2)

Answers

Answer 1

Answer:

[tex]sin(\frac{143.13}{2} )=0.9487\\\\cos(\frac{143.13}{2} )=0.3162\\\\tan(\frac{143.13}{2} )=2.9999=3\\[/tex]

Step-by-step explanation:

angles in II quadrant are found by solvig 180- ∅ where ∅ is the acute angle

Let us then find the acute angle: in[tex]cos^{-} (\frac{4}{5}) = 36.86^{0} \\\\so \ x \ the \ angle \ in \ the \ second \ quadrant \ is \ 180-36.86=143.13^{0} \\\\sin(\frac{143.13}{2} )=0.9487\\\\cos(\frac{143.13}{2} )=0.3162\\\\tan(\frac{143.13}{2} )=2.9999=3\\[/tex]


Related Questions

Amanda, Rafael, and Michael served a total of 92 orders Monday at the school cafeteria. Rafael served 2 times as many orders as Michael. Amanda served 8 more than Michael.

How many orders did they each serve?

Answers

The number of orders Michael, Rafael and Amanda served are 16.8, 33.6, and 41.6 servings

respectively.

Equation

Michael = xRafael = 2xAmanda = 2x + 8Total servings = 92 orders

x + 2x + (2x + 8) = 92

3x + 2x + 8 = 92

5x = 92 - 8

5x = 84

x = 84/5

x = 16.8 servings

Therefore,

Michael = x

= 16.8 servings

Rafael = 2x

= 2(16.8)

= 33.6 servings

Amanda = 2x + 8

= 33.6 + 8

= 41.6 servings

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Which distance formula or formulas show(s) a joint variation?

Answers

d=r•t ,  formula show a joint variation ,  Option C is the answer.

What is a Joint Variation  ?

The variation when a variable is dependent upon two or more variables and varies directly as either of them are taken constant is called Joint Variation.

According to the question , which among the options shows a Joint Variation.

Option 1  d = 50 t

It shows direct variation , as increase in t will directly increase d 50 times * the increase

Option 2 d = 16t²

It also shows direct square variation .

Option 3 d=r•t

In this variation d is dependent on two variables and so it is a joint variation.

Therefore Option C is the answer.

The complete question is ?

Which distance formula or formulas show a joint variation? d=50t, d=16t^2, d=r•t

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In 3 years, Dianna will be 4 times as old as she was 33 years ago. How old is Dianna now?

Choose the most logical value for the variable to represent.

Let x = .

Answers

Given that In 3 years, Dianna will be 4 times as old as she was 33 years ago, her present age is 45.

How old is Dianna now?

Given that, in 3 years, Dianna will be 4 times as old as she was 33 years ago.

Let x represent the age of Dianna presently.

Dianna's age in 3 years time will be: x + 3

Dianna's age 33 years ago is: x - 33

Since in 3 years, she will be 4 times as old as she was 33 years ago.

x + 3 = 4( x - 33 )

We solve for x

x + 3 = 4x - 132

3 + 132 = 4x - x

135 = 3x

x = 135/3

x = 45

Given that In 3 years, Dianna will be 4 times as old as she was 33 years ago, her present age is 45.

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Austin taxi charges $5 plus $0.30 per mile for fare city. What will be the linear equation for the charges if use Austin’s taxi?

Answers

Answer: 5+(.30x)
Expiation: you are charger $5 for the ride but 0.30 per mile so you would have to multiply 0.30 my how many miles you going and add 5 to find your sum.

3. Anneliese spent $58.00 on music items and paid $35.00 on a lay-away item. If she has
-142.00 left in her account, how much did she start with?
A $-49.00
B$93.00
C$135.00
D-$235.00

Answers

The amount Anneliese started with before her deductions is -$235.00.

Account balance

Amount spent on music items = $58.00Amount paid for lay-way item = $35.00

Total amount spent = $58.00 + $35.00

= $93.00

Amount left in her account = $-142.00

Amount spent is a negative to her account

Amount Anneliese started with = -$93.00 - $-142.00

= -$235.00

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NEED ANSWER ASAP
The graph of F(x), shown below, resembles the graph of G(x) = x², but it has
been changed somewhat. Which of the following could be the equation of F(x)

Answers

[tex]f(x) = - 3(x + 3) {}^{2} + 3[/tex]

Option D

1. Find the volume of the pyramid.
5 in
11 in
9 in
74

Answers

The volume of the pyramid with the given length, width and height is 165in³.

What is the volume of the pyramid?

The volume of a right rectangular pyramid is expressed as;

V = ( L × W × H ) / 3

Given that;

Length L = 11inWidth W = 9inHeight H = 5in

We substitute into the equation above.

V = ( L × W × H ) / 3

V = ( 11in × 9in × 5in ) / 3

V = 495in³ / 3

V = 165in³

The volume of the pyramid with the given length, width and height is 165in³.

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The question is below please answer quickly

Answers

Answer:

50 meters

Step-by-step explanation:

2cm = 5m, so we know that the length is 5m

4cm = 2cm * 2, so the width is 5m * 2, which is 10m.

Now, we multiply them together.

5*10 = 50

The backyard area is 50 meters

Answer:

50m^2

Step-by-step explanation:

A recent study of 28 city residents showed that the mean of the time they had lived at their present address was 9.3 years. The standard deviation of the population was 2 years. Find the 90% confidence interval of the true mean? Assume that the variable is
approximately normally distributed. Show all your steps

Answers

Answer:

We are 90% confident that the true mean lies between 8..6563 and     9.9437  

Step-by-step explanation:

The mean of your estimate plus and minus the range of that estimate constitutes a confidence interval. Within a specific level of confidence, this is the range of values you anticipate your estimate to fall within if you repeat the test. Confidence is another word for probability.

mean (x) = 9.3                        

standard deviation (s) = 2                        

sample size (n) = 28                        

T- Distribution:

degree of freedom = n - 1 = 28 - 1 = 27    

90% Confidence Interval ==> α = 0.1

critical value, t =  1.703 ( t-table)

standard error, SE = s/√n = 2 /√28 = 0.3780

margin of error, E = t × SE= 1.703 × 0.3780 = 0.6437

Confidence Interval: x ± E = 9.3 ± 0.6437

lower limit: x - E = 9.3 - 0.6437 = 8.6563    

upper limit: x + E = 9.3 + 0.6437 = 9.9437    

Confidence Interval: 8.6563 < µ < 9.9437

Z - Distribution:

Formula: Confidence Interval = x ± z (s/√n)

Sample Mean = s/√n = 2/√28 = 2/5.29 = 0.3781

z = 1.645 (from z - table)

From formula, z (s/√n): 0.3781 x 1.645 = 0.620 (rounded)

x ± 0.62

lower limit: x - 0.62 = 9.3 - 0.62 = 8.68  

upper limit: x + 0.62 = 9.3 + 0.62 = 9.92

Confidence Interval: 8.68 < µ < 9.92

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solve this question in the picture
YOU HAVE TO FIND THE AREA OF THE SHADED REIGON IN THE GIVEN PICTURE
●Give right answers
●please solve fast
●Thank you, please solve this part
●FIND the area of the shaded part​

Answers

Answer: [tex]64\pi[/tex]

Step-by-step explanation:

Area of the outer circle: [tex](\pi)(10^{2})=100\pi[/tex]

Area of the inner circle: [tex](\pi)(6^{2})=36\pi[/tex]

Subtracting these areas, we get the area of the shaded region is [tex]\boxed{64\pi}[/tex]

estimate 10,867+26,186 by first rounding to the nearest thousand.

Answers

Answer:

37,000

Step-by-step explanation:

10,867 rounds to 11,000 and 26,186 to 26,000. 11,000 + 26,000 = 37,000

The answer to this problem?

Answers

The simplified expression of [tex]\sqrt{\frac{162x^9}{2x^{27}}}[/tex] is [tex]\frac{9}{x^9}[/tex]

How to simplify the expression?

The expression is given as:

[tex]\sqrt{\frac{162x^9}{2x^{27}}}[/tex]

Divide 162 and 2 by 2

[tex]\sqrt{\frac{81x^9}{x^{27}}}[/tex]

Take the square root of 81

[tex]9\sqrt{\frac{x^9}{x^{27}}}[/tex]

Apply the quotient rule of indices

[tex]9\sqrt{\frac{1}{x^{27-9}}}[/tex]

Evaluate the difference

[tex]9\sqrt{\frac{1}{x^{18}}}[/tex]

Take the square root of x^18

[tex]\frac{9}{x^9}[/tex]

Hence, the simplified expression of [tex]\sqrt{\frac{162x^9}{2x^{27}}}[/tex] is [tex]\frac{9}{x^9}[/tex]

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Which type of function best models the data in the table below

Answers

The function represented by the table is therefore y = -x -2 which is linear in nature

Linear functions

Linear function are functions that have a leading degree of 1. using the coordinate points on the graph

(0, -2) and (1, -3)

Note that the function will be linear since the dependent and independent variables both have the same common difference.

Determine the slope

slope =  -3+2/1-0
slope = -1/1

slope = -1

For the intercept, it is -2 according to the coordinate (0, -2)

The function represented by the table is therefore y = -x -2 which is linear in nature

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if kokichi has 25 pencils and his classmate nagito borrowed 13, how many pencils does kokichi have?

Answers

Answer:

25-13=12 kokichi has 12 left

Step-by-step explanation:

hope it helps sorry if I'm wrong

Answer:

Basic math 25 - 13 =   12

Step-by-step explanation:

18. Identify a transformation of the function f(x) = « by observing the equation of the function g(x) = x + 3.

Answers

The function shows a horizontal shift of the function to the right by 3 units

Transformation of functions

Transformation is a techniques used to change the position of an object on an xy-plane. Given the parent function f(x) = x

The translated function g(x) = x + 3 shows a horizontal shift of the function to the right by 3 units

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a history book weights 24 oz more than a math book. the marh book is 75% the weight of the history book. how much does each book weight

Answers

The weight of the math and the history book are 72 and 96 ounces respectively.

How to find the weight of a book?

A history book weights 24 oz more than a math book.

Therefore,

let

x = weight of math book

weight of history book = 24 + x

The math book is 75% the weight of the history book.

Therefore,

math book weight = 75 / 100 (24 + x)

x = 75 / 100 (24 + x)

x = 1800 + 75x / 100

100x =  1800 + 75x

100x - 75x =  1800

25x = 1800

x = 1800 / 25

x = 72

Therefore,

weight of math book = 72 ounces

weight of history book = 72 + 24 = 96 ounces.

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9) James purchased a shirt at 20% off. The regular price was $14.95. What was the markdown? What was the final
price?
O a.) a. $2.89; b. $11.46
Ob.) a. $2.99; b. $11.96
Oc.) a. $2.99; b. $11.86

Answers

Answer is b. $2.99, $11.96
Step by step
We know the regular price is 14.95
We know the discount os 20%
To find the mark down or discount, multiply the price x % discount
14.95 x .20 = 2.99 discount
To find the final price, take the original price less the markdown price
14.95 - 2.99 = 11.96
So $2.99 and $11.96

Determine the measure of the interior angle at vertex C

A. 180
B. 54
C. 240
D. 144

Answers

The measure of the interior angle at vertex C is D. 144.

How to calculate the angle?

Based on the information given, the angle will be calculated thus:

8x + 8x + 8x + 3x + 3x = (5 - 2) × 180

30x = 540

Divide both side by 30

30x/30 = 540/30

x = 18

Therefore, at vertex C, we have 8x. This will be:

= 8x

= 8 × 18

= 144

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The following stem-and-leaf plot represents the test scores for 26 students in a class on their most recent test. Use the data provided to find the quartiles.

Stem Leaves

6 0 1 2 2 4 7 8

7 0 1 2 5 8

8 3 6 6 7 9 9

9 0 1 2 2 2 4 5 8

Key:

6|0=60

Find the first quartile and third quartile

Answers

Considering the given data-set, the quartiles are given as follows:

The first quartile is of 67.5.The third quartile is of 91.5.

What are the median and the quartiles of a data-set?

The median of the data-set separates the bottom half from the upper half, that is, it is the 50th percentile.The first quartile is the median of the first half of the data-set.The third quartile is the median of the second half of the data-set.

There is an even number of elements(26), hence the median is the mean of the 13th and 14th elements, the first half is the 12 elements from 1 to 12, and the second half is the 12 elements from 15 to 26.

The first quartile is the mean of the 6th and 7th elements, which are 67 and 68, hence:

Q1 = (67 + 68)/2 = 67.5.

The third quartile is the mean of the 6th and 7th elements of the second half, hence:

Q3 = (91 + 92)/2 = 91.5.

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Rachel runs 7 miles in 80 minutes. At the same rate, how many miles would she run in 64 minutes?

Answers

Answer:

[tex]\huge\boxed{\sf 5.6 \ miles}[/tex]

Step-by-step explanation:

Given that,

Rachel runs 7 miles in 80 minutes.

80 minutes = 7 miles

Using unitary method

Divide 80 to both sides

1 minute = 7/80 miles

1 minute = 0.0875 miles

Multiply 64 to both sides

64 minutes = 0.0875 × 64 miles

64 minutes = 5.6 miles

So, Rachel will run 5.6 miles in 64 minutes.

[tex]\rule[225]{225}{2}[/tex]

Which is the graph of y = 2 – square root of x?

On a coordinate plane, a curved line approaches the grid line at (3, 2.3), crosses the y-axis at (0, 1.5) and ends at (negative 2, 0).

On a coordinate plane, a curved line approaches the grid line at (negative 3, 2.3), crosses the y-axis at (0, 1.5) and ends at (2, 0).

On a coordinate plane, a curved line approaches the grid line at (3, 0.3), and ends at (0, 2).

Answers

Using translation concepts, the graph of [tex]y = 2 - \sqrt{x}[/tex] is described as follows:

On a coordinate plane, a curved line approaches the grid line at (3, 0.3), and ends at (0, 2).

What is a translation?

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction in it's definition.

Function [tex]y = 2 - \sqrt{x}[/tex], in blue in the graph, is the function [tex]y = \sqrt{x}[/tex], in red, reflected over the x-axis and shifted 2 units, as shown in the graph.

Hence the correct statement is:

On a coordinate plane, a curved line approaches the grid line at (3, 0.3), and ends at (0, 2).

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Which choice is the correct graph of Ix <3?
A +
-6
B++
-6
C
-6
DH
-4
-5
-5
-6 -5
F++
-6
EH
-6
-4
-3
-4
-3
-3
3
-4
-5
-2
-2 -1
OA. Graph A
OB. Graph B
C. Graph C
-3 -2 -1
-2 -1
-20
-2
-3
0
0 1
0
0
-1 0
1
1
1
1
2
2
2
2
2
2
3
3
e
4
3 4
4 5
01
3
4
3
3 4
5
5
5
5
6
6
6
6
6
5
4
6

Answers

Answer:

2347 elevated in the cube

Step-by-step explanation:

nashe

Write in expanded form. Use parentheses to indicate multiplication.

(-a)^3

Answers

The expanded form of the expression; (-a)^3 is; (-a)(-a)(-a).

What is the expanded for. if the expression?

It follows from the task content that the expanded form of the expression given is to be written.

On this note, the expression (-a)³ can simply be rewritten in it's expanded form as; (-a)(-a)(-a).

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PLEASE PLEASE HELP THANK YOU SO MUCH UE AMAZING

Answers

Answer:

2MN=RA+TP

13×2=x+18

26=x+18

26-18=x

8=x

I need help please. Trying to get my HS diploma. I did not graduate :(

Find the holes of the function

Answers

Answer:

  (a)  none

Step-by-step explanation:

A "hole" in the graph of f(x) is located at an x-value where the left limit of the function and the right limit are the same finite value, but the function is undefined at that value of x.

Example

The function f(x) = (x -2)/(x -2) can be reduced to the function f(x) = 1, which is defined everywhere. That reduction occurs when the numerator factor (x-2) cancels the same binomial denominator factor. A graph of the original function will be a straight horizontal line with a "hole" at (2, 1).

The attachment shows a graph.

Given Function

The given function can be reduced, but the reduced function remains undefined at x=1/2. Not all of the denominator factors are cancelled there. The function is graphed in the second attachment. At x=1/2, there is a vertical asymptote, not a hole.

  [tex]g(x)=\dfrac{(2x-1)(x+4)^2(x-1)(3x+2)}{3x(x-4)(2x-1)^3}\qquad x\notin \left\{0,\dfrac{1}{2},4\right\}\\\\g(x)=\dfrac{(x+4)^2(x-1)(3x+2)}{3x(x-4)(2x-1)^2}\qquad x\notin \left\{0,\dfrac{1}{2},4\right\}[/tex]

There are no holes in the function's graph.

__

Additional comment

A hole can occur for a variety of reasons. In the graph of a rational function, it will generally be found where numerator and denominator zeros cancel each other completely, and the function can be "reduced" to one that is define at the location of those zeros.

It can also occur in piecewise defined functions, where the pieces are defined on adjoining (half) open intervals. For example:

  [tex]f(x)=\begin{cases}-x&\text{for }x < 0\\x&\text{for }x > 0\end{cases}[/tex]

has a hole at (0, 0).

Can u help me with number 7 I

Answers

Answer:

Scalene Triangle

Step-by-step explanation:

Defn
When all the three sides of the triangle are of different measures, it is a scalene triangle.

Answer:

It is a scalene triangle since all sides have different measurements.

Step-by-step explanation:

HELP PLEASE QUICK!
What is the area of the irregular figure below

Answers

See the picture below for answer

Find the trigonometric form of the number 3 + √3i.

Answers

Any complex number [tex]z[/tex] can be written in trigonometric form as

[tex]z = |z| e^{i\arg(z)} = |z| \left(\cos(\arg(z)) + i \sin(\arg(z))\right)[/tex]

where [tex]|z|[/tex] is the modulus of [tex]z[/tex] and [tex]\arg(z)[/tex] is its argument, i.e. the angle [tex]z[/tex] makes with the positive real axis in the complex plane.

We have

[tex]|z| = \sqrt{3^2 + \left(\sqrt3\right)^2} = \sqrt{12} = 2\sqrt3[/tex]

and

[tex]\arg(z) = \tan^{-1}\left(\dfrac{\sqrt3}3\right) = \tan^{-1}\left(\dfrac1{\sqrt3}\right) = \dfrac\pi6[/tex]

Then

[tex]3 + \sqrt3 \, i = \boxed{2\sqrt 3 \left(\cos\left(\dfrac\pi6\right) + i \sin\left(\dfrac\pi6\right)\right)}[/tex]

Type the correct answer in each box.

Answers

The inverse of the function are respectively; f⁻¹(3) = 2 and f⁻¹(8) = 8.5

How to find the inverse of a Function?

The formula to find the equation of this function using two coordinates is;

(y - y1)/(x - x1) = (y2 - y1)/(x2 - x1)

Using the first 2 coordinates, we have;

(y - 1)/(x + 1) = (3 - 1)/(2 + 1)

(y - 1)/(x + 1) = 2/3

3y - 3 = 2x + 2

3y = 2x + 5

y = ¹/₃(2x + 5)

Thus, the inverse is;

f⁻¹(x) = (3x - 5)/2

Thus;

f⁻¹(3) = (3*3 - 5)/2

f⁻¹(3) = 2

Similarly;

f⁻¹(x) = (3x - 5)/2

Thus;

f⁻¹(8) = (3*8 - 5)/2

f⁻¹(8) = 8.5

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The sale price of a laptop is R3 700,00, which is only 65% of the original price. Calculate the original price.​

Answers

The original price of a laptop that is 65% of the sales price is R3 1076923.07692

How to find the original price when given the percentage?

The sale price of a laptop is R3 700,00,which is only 65% of the original price.

Therefore,

let

x = original price

Hence,

700, 000 = 65% of x

700,000 = 65 / 100 of x

cross multiply

70000000 = 65x

divide both sides by 65

x = 70000000 / 65

x = 1076923.07692

Therefore, the original price of the laptop is R3 1076923.07692

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