trig///HELPP PLEASE!! i’ve been stuck on this for 30 minutes!!

Trig///HELPP PLEASE!! Ive Been Stuck On This For 30 Minutes!!

Answers

Answer 1

Answer: There are two solutions and they are

theta = 135

theta = 225

=============================================================

Explanation:

Recall that x = cos(theta). Since the given cosine value is negative, this indicates x < 0. Theta is somewhere to the left of the y axis, placing it in quadrant 2 or quadrant 3.

It turns out there are two solutions, with one solution per quadrant mentioned above. Use the unit circle to find that the two solutions are:

theta = 135

theta = 225

You're looking for points on the unit circle that have x coordinate equal to x = -sqrt(2)/2. Those two points correspond to the angles of 135 and 225, which are in quadrants 2 and 3 respectively.

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I recommend using your calculator to note that

-sqrt(2)/2 = -0.70710678

cos(135) = -0.70710678

cos(225) = -0.70710678

The decimal values are approximate. Make sure your calculator is in degree mode. Because those three results are the same decimal approximation, this indicates that cos(135) = cos(225) = -sqrt(2)/2.


Related Questions

The bowling team at Lincoln High School must choose a president, vice president, and secretary. If the team has 19 members, how many ways could the officers be chosen?

Answers

Answer:

Officers can be chosen in 5,814 different ways.

Step-by-step explanation:

Given that the bowling team at Lincoln High School must choose a president, vice president, and secretary, to determine, if the team has 19 members, in how many ways could the officers be chosen, the following calculation must be performed:

19 x 18 x 17 = X

342 x 17 = X

5.814 = X

Therefore, officers can be chosen in 5,814 different ways.

Cada material en sus distintos estados de agregacion, cambia de volumen de forma diferente, sin embargo todos lo hacen en cierta medida. A esta propiedad se le llama

Answers

La respuesta correcta para esta pregunta abierta es la siguiente.

Aunque no se anexaron opciones o incisos para contestar, podemos comentar lo siguiente.

Cada material en sus distintos estados de agregación, cambia de volumen de forma diferente, sin embargo todos lo hacen en cierta medida. A esta propiedad se le llama Estados de Agregación de la Materia.

Las substancias cambian su composición debido a la presión o al cambio de temperatura a la que son sometidos. A ese proceso se le conoce como el estado de agregación de la materia, cuando las moléculas y átomos que constituyen esa matera se ve sometido a una transformación en su composición.

Podemos reconocer comúnmente cuatro estados de transformación de la materia, que son, el estado de plasma, el estado gaseoso, el estado líquido y el estado sólido

The radius of a circle is 7 inches. What is the circle's area?
r=7 in
Use 3.14 for .
square inches

Answers

Answer:

153.86

Step-by-step explanation:

3.14 x (7x7) = 153.86

yo please help i’ll give u a brainliest

Answers

Answer:

4

Step-by-step explanation:

1st: do 2x3=6 so if 1 6in scoop makes one pitcher of tea then you could make about 4 pitchers of tea because there are the volume of the pitcher of tea mix is 24in so 24/6=4

Express 9+9+9+9 as a single multiplication operation.​

Answers

Answer:

9 x 4

Step-by-step explanation:

This recipe makes 20 cupcakes. Deepak only wants to make 15 cupcakes. How much of each ingredient does he need? Recipe: Makes 20 cupcakes 10 ounces butter 12 ounces sugar 8 ounces flour 4 eggs

Answers

Answer:

9.6 ounces of butter, 8 ounces of sugar, 12 ounces of flour, 4 eggs

Explanation: 20 / 16 = 4/5. 16 is four-fifths of 20. So multiply 4/5 with everything.

12 * 4/5 = 9.6 ounces

10 * 4/5 = 8 ounces

15 * 4/5 =  12 ounces

5 * 4/5 = 4 eggs

find the value of x:)

Answers

Answer:

180 - 58 - 42 = x : sum of angles in a triangle add to 180

80 = x

It’s a right triangle. So you can obvi see that the angle is a 90 degree angle.

hey! i hope your day been good so far ! can anyone help me :)?!

Answers

Answer:

Its 7/ 8

dive the 10 1/2 by the 3/4

Step-by-step explanation:

Answer:

14

Step-by-step explanation:

3/4 / 10 1/2 = 1/14

3/4 * 14 = 10 1/2

PLEASE HELP EASY MATH!!!!

Answers

The answer is D.
This is because A=b•h which is A=8•5 A=40
Also P=b+b+h+h which is P=8+8+5+5 P=26

a class has ten girls and three boys. if the teacher randomly picks ten students,what is the probability that he will pick all girls?​

Answers

Answer:

10/13

Step-by-step explanation:

You will first add all the students the mentioned which gives you 13 then since they ask what is the probability it the teacher would pick girls. You know there's 10 girls and 3 boys so it would be 10/13.                                  

If 3 men can paint 4 houses in 5 days , how many days does it take for 7 men paint 14 houses ??? help me plz

Answers

Answer:

3men = 4houses= 5days

7men= 14houses= x days

14÷7 = 2days

The function f(t)=-16t^(2)+64 represents the height y (in feet ) of a water droplet t seconds after falling from an icicle. After how many seconds does the water droplet hit the ground

Answers

Answer:

The answer is two seconds

Step-by-step explanation:

Set the y to 0 as we are looking for the height when f(t) has hit the ground. Then factor and the two zeros of the function are -2 and 2. because the -2 is an answer that that cannot make sense for time in a real world scenario, the answer is the positive zero, or two. :-)

Graph the points (0, 6) and (-8, 0). Which of the following points would create a right triangle?
A (-6,8)
B(-8,6)
C(8, -6)
D(6,-8)​

Answers

Answer:

D, I think. Screenshot attached with the points.

Step-by-step explanation:

We have given two points (0, 6) and (-8, 0). The third point (8, -6) will make a complete right-angle triangle.

What is the right triangle?

A right-angle triangle is a triangle that has a side opposite to the right angle the largest side and is referred to as the hypotenuse. The angle of a right angle is always 90 degrees.

We have given two points  (0, 6) and (-8, 0). we want to find Which of the following points would create a right triangle.

We have mentioned the points on the graph that represent a right-angle triangle. we know that the point (8, -6) will make a complete right-angle triangle.

Learn more about a right angle;

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Please help me this is my last question

Answers

Answer:

x=-22

Step-by-step explanation:

Estimate the line of best fit using two points on the line.
(5, 60)
(3, 44)
O A. y= 5x + 20
O B. y = -5x + 16
O C. y= -8x + 16
D. y = 8x+ 20

Answers

The estimated equation of line is y = 8x+ 20

What is linear equation?

A linear equation is defined as an equation in which the highest power of the variable is always one.

Two points on the line (5, 60), (3, 44)

[tex]y- y_1= \frac{y_2-y_1}{x_2-x_1} (x-x_1)[/tex]

[tex]y- 60 = \frac{60-44}{5-3} (x-5)[/tex]

[tex]y- 60 = \frac{16}{2} (x-5)[/tex]

[tex]y = 8 (x-5)+ 60[/tex]

[tex]y = 8x+ 20[/tex]

Hence, the estimated equation of line is y = 8x+ 20

Learn more about equation of line

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Work out
(8×10^-2)−(4×10^-4)
Give your answer in standard form.

Answers

Answer:

7.96 x 10^2

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10

. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

The standard form of [tex]8\times10^{-2} - 4\times10^{-4}[/tex] is [tex]\frac{38}{5000}[/tex].

What is a numerical expression?

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

Given, [tex]8\times10^{-2} - 4\times10^{-4}[/tex].

[tex]= \frac{8}{10^2} - \frac{4}{10^4}[/tex].

[tex]= \frac{8}{100} - \frac{4}{10000}[/tex].

[tex]= \frac{80 - 4}{10000}[/tex].

[tex]= \frac{76}{10000}[/tex].

[tex]= \frac{38}{5000}[/tex].

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Find the percent error in this situation:
Estimated value: 56
Actual value: 43
23.2%
0.302%
30.2%
0.232%

Answers

Answer:

30.2%

Step-by-step explanation:

Use the percent error formula:

| (experimental - actual) / actual | x 100

Plug in the experimental and actual values:

| (experimental - actual) / actual | x 100

| (56 - 43 ) / 43 | x 100

(13 / 43) x 100

= 30.2

So, the percent error is 30.2%

Honestly I do not like bullies. If you are a bully than STOP.

Answers

Answer:

lol i don't like bullies either

i mean...i say that now...but in first grade i used to be a bully....we don't talk about that tho

anyways have a nice day and show them bullies who's boss

Exactly no one likes bullies :)

Consider the division expression 7 ½ ÷ 2. Select all multiplication equations that correspond to this division expression.

Answers

Answer:

i dunno

Step-by-step explanation:

but i need the points to ask questions

Look at the triangle 5

hello please help i’ll give brainliest

Answers

Answer:

Option B) His teachings became government philosophy.

The option is (B). His teaching became gov

What is X?? I really
Need help!!!

Answers

Answer:

it's d

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Subtract the sum of the given angles from 180 for x

x = 180 - (125 + 38) = 180 - 163 = 17 → C

he total cost of a vase of spring flowers at a flower shop depends on the number of flowers ordered. The vase costs $3, and each flower costs $2.50. Which equation can be used to findc,the total cost of the vase withfflowers?

Answers

Answer:

3+2.50x

Step-by-step explanation

x represents how many flowers you bought which you mulitply with 2.50 since each flower is 2.50 dollars. Then you add 3 since the cost of the vase is 3 dollars.

Write the definition of "congruent" in your own words.

Answers

Answer:

The same shapes but flipped or turned.

Step-by-step explanation:

Answer:

the same shape and size but we allowed to flip slide or turn

hope this help

Regina has 16 pencils. James has 3 times as many pencils as Regina.
What are two ways to find the number of pencils James has?
A. 16 + 3 and 16 X 3
B. 16 + 16 + 16 and 16 x3
O C. 3+3+3 and 48 X3
D. 16 + 3 and 3 X 48
E. 3+3+3 + 16 and 16 X 3

Answers

Answer:

B

Step-by-step explanation:

What is the slope of the straight line that goes
through (1, 8) and (3, 4) ?

Answers

Answer:

-2

Step-by-step explanation:

Slope of the line

[tex] = \frac{8 - 4}{1 - 3} \\ \\ = \frac{4}{ - 2} \\ \\ = - 2[/tex]

There are 255 calories in 6 ounces of a type of ice cream. How many calories are in 8 ounces of that ice cream?

Answers

Answer:

340

Step-by-step explanation:

255 divided by 6 equals 42.5

255 plus 42.5 times 2

Someone help me pls

Answers

the answer is A

5^-8 × 5^4= 5^-8+4

= 5^-4

= 1/5^4

Exam
The blueprint's scale is
1 inch : 9 feet. If the gym's
area is 52 square inches on the
blueprint, what is the actual
square footage of the gym?
The area of the actual gym
is_square feet.

Answers

Answer:

4212 square feet.

Step-by-step explanation:

If the blueprint's scale is 1 inch : 9 feet.

Square both sides

(1in)² = (9ft)²

1in² = 81ft²

Given the  gym's  area as 52 square inches, hence;

52in² = x

Divide both expressions

1/52 = 81/x

x = 52 * 81

x = 4212ft²

Hence the area of the actual gym  is 4212 square feet.

While vacationiong, you decided to go bungee jumping off a cliff into the river. Your height as a function of time is modeled by the function h(t)= -16t^2+16t+370, where t is time in seconds and h is the height in feet.

When did u hi the water? Round your answer to the nearest hundreth?

Answers

Answer:

5.33 Seconds

Step-by-step explanation:

This is because you have to do the quadratic equation and solve.

The time required to hi the water is 5.33 seconds.

What is a quadratic equation?

A quadratic equation is a second-order polynomial equation in a single variable x as ax^2+bx+c=0 with a ≠ 0 . A quadratic equation as an equation of degree 2, meaning that the highest exponent of this function is 2.

For the given situation,

The function is h(t)= -16t^2+16t+370

The roots of this function can be found by using the formula,

[tex]t=\frac{-b+\sqrt{b^{2}-4ac } }{2a}[/tex] or [tex]t=\frac{-b-\sqrt{b^{2}-4ac } }{2a}[/tex]

Here, a=-16, b=16, c=370

⇒ [tex]t=\frac{-16+\sqrt{16^{2}-4(-16)(370) } }{2(-16)}[/tex] or [tex]t=\frac{-16-\sqrt{16^{2}-4(-16)(370) } }{2(-16)}[/tex]

⇒ [tex]t=\frac{-16+\sqrt{23936} }{-32}[/tex] or [tex]t=\frac{-16-\sqrt{23936} }{-32}[/tex]

⇒ [tex]t=\frac{-16+154.712}{-32}[/tex] or [tex]t=\frac{-16-154.712}{-32}[/tex]

⇒ [tex]t=\frac{138.712}{-32}[/tex] or [tex]t=\frac{-170.712}{-32}[/tex]

⇒ [tex]t=-4.33[/tex] or [tex]t=5.33[/tex]

Time cannot be negative. So the value is 5.33.

Hence we can conclude that the time required to hi the water is 5.33 seconds.

Learn more about quadratic equation here

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Mia went for a long bike ride. She rode 10.25 kilometers each hour for 4.25 hours, how far did Mia travel on her bike ride?

•44.5625 km
•43.5625 km
•40.5000 km
•14.5000 km

Answers

Answer:

B..... 43.5625 km

Step-by-step explanation:

Other Questions
Kilgore's Deli is a small delicatessen located near a major university. Kilgore does a large walk-in carry-out lunch business. The deli offers three luncheon chili specials, Wimpy, Dial 911, Fire Bowl. At the beginning of the day, Kilgore needs to decide how much of each special to make (he always sells out of whatever he makes).The profit on one serving of Wimpy is $0.6, on one serving of Dial 911 is $0.55, and on one serving of Fire Bowl is $0.65.The following table shows the required ingredients to make one serving of each chili special, and the available amount of each ingredient for today :Ingredient Required ingredient for each serving of Wimpy Required ingredient for each serving of Dial 911 Required ingredient for each serving of Fire Bowl Available AmountBeef (lbs) 1 1 1.5 15Onions (cup) 2 2 2 20Special Sauce (oz) 5 2 3 90Hot Sauce (oz) 0 5 6 60Based on the historical sales data, Kilgore's Deli has the following considerations:the number of servings for Fire Bowl must be at least 10% of the total number of servings for all three luncheon chili specials.the number of servings for Fire Bowl, however, cannot exceed the number of Dial 911 by more than 3.the available number of servings for Dial 911 must be at least 2.(1.1) Develop the linear programming model to help determine the number of servings of Wimpy, Dial 911, and Fire Bowl to make in order to maximize his profit today. Type your algebraic formulation in the specified area in Q1 tab of the Excel template. Note you will not get full credits without including the algebraic formulation.(1.2) Solve your LP model in Excel and fill in the following blanks (show your work in Q1 tab):The optimal number of servings of Wimpy is The optimal number of servings of Dial 911 is The optimal number of servings of Fire Bowl is The maximum possible profit is Is there any leftover of ingredients as a result of this optimal solution? if yes, enter the amount. Otherwise, just type 0. Amount of beef leftover Amount of onion leftover Amount of special sauce leftover Amount of hot sauce leftover Please Help! In what areas of New Zealand might you expect to find compression? Explain your answer. Btw I don't want any links for the answers! the cost of using broadband in a hotel is 30 per hour formula to work out this total this total cost is cost in pounds = 3 number of hours. Workout the total of using boardband for 2 hours and 5 hours Please help me I will mark BRAINLIEST What is the weight of the contents of a 50 gallon drum of alcohol? Express answer to the nearest hundredth pound. A grocery store sells steak for $6.10 per pound. What would be the cost of 2.6pounds of steak?Record your answer. Be sure to use the correct place value. help me I need to make a 100% so that i can move on in ELA please don't guess and get this right What event was the direct cause of the Cuban missile crisis?Athe invasion of the Bay of PigsBthe nuclear bombing of CubaCNikita Khrushchev's shoe-banging speechDFidel Castro's revolution in Cuba Find the 3rd term in the expansion of (a+b)^8 in simplest form. What does Solving a system by Substitution mean? According to many scientists, what effect does pollution have on global temperatures?A. Pollution causes acid rain, which leads to rising sea levels.B. Chemicals in pollution end up in the oceans, causing water temperatures to rise.C. Pollution decreases ozone, which prevents the Earth from absorbing heat from the Sun.D. Many chemicals in pollution act like greenhouse gases, which trap heat in the atmosphere.Please select the best answer from the choices provided OD I dont know what to do please help Which of the following ratios is not 2:5A. 40:100B. 10:20C. 16:40D. 6:15 HELP PLEASE LIAM SAYS -(5/12) is equal to 5/-12 is he correct or wrong ? The graph of a linear system is shown pls help i will mark brainleist 9(5x + 1) 3yFrom the expression above, provide an example of each of the following: sum, term, product, factor, quotient, and coefficient. If any are not present, write "not present." help help help help hep help help help help please please disturbance destroying an area through the climax of ecological succession A $10 decrease followed by a $15 increaseSame as the original, less than, or greater than the original? There is 1/3 of a pizza left to split between 3 of your friends. If you split the pizza equally. What fraction of the pizza will each of your friends get.