Which statements involving cosine and sine are true? Check all that apply.

sin(–45°) = –sin(45°)
sin(–45°) = sin(45°)
cos(–45°) = –cos(45°)
cos(–45°) = cos(45°)
cos(–45°) = sin(–45°)

Answers

Answer 1

Answer:

sin(–45°) = –sin(45°)

cos(–45°) = cos(45°)

Step-by-step explanation:

Which Statements Involving Cosine And Sine Are True? Check All That Apply. Sin(45) = Sin(45)sin(45) =
Answer 2

The statements which involving cosine and sine are true are sin(–45°) = –sin(45°) and cos(–45°) = cos(45°).

What are Trigonometric Ratios?

Trigonometric ratios are the ratios which is described for two sides of a right angled triangle.

The main three trigonometric ratios are sine, cosine and tangent functions.

Trigonometric functions are also called as Circular functions.

There are five statements given.

We have the identities that,

sin (-x) = - sin(x) and

cos (-x) = cos x

Using this for each of the statement,

sin(–45°) = –sin(45°) is true.

sin(–45°) = sin(45°) is false

cos(–45°) = –cos(45°) is false

cos(–45°) = cos(45°) is true

For the last one,

cos(–45°) = cos (45°) = sin (45°) ≠ sin(–45°)

So this is false.

Hence the true statements are sin(–45°) = –sin(45°) and cos(–45°) = cos(45°).

Learn more about Trigonometric Ratios here :

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Related Questions

34 x 21
22 x 41
17 x 66
59 x 5
which pair factor ONLY contains composite numbers ?

Answers

Answer:

The last option

The Virginia Resolution was written by John Adams. Aaron Burr. Thomas Jefferson. James Madison.

Answers

Answer:

D.

Step-by-step explanation:

Did the test

Answer:

Jame´s Madison.

Step-by-step explanation:

2 with the exponent of 2​​ ⋅(45÷9) - 3
i need the answer

Answers

Honestly don’t know

what is the factterd form for the eqaution 3x^2+8x+4

Answers

Answer:

(3x+2)(x+2)

Step-by-step explanation:

1 Split the second term in 3{x}^{2}+8x+43x

​2

​​ +8x+4 into two terms.

3{x}^{2}+6x+2x+43x

​2

​​ +6x+2x+4

2 Factor out common terms in the first two terms, then in the last two terms.

3x(x+2)+2(x+2)3x(x+2)+2(x+2)

3 Factor out the common term x+2x+2.

can we still reduce 4/5 to the lowest term?​

Answers

Answer:

no as both terms cannot be futher divided.

nope. 4/5 doesn’t have any thing in common so 4/5 is already lowest. for example, if it was 4/8 they can be cut down to 1/2. both numbers have a 4 in common so divide both top and bottom by 4 to get 1/2.

Trevor went to the pet store to get a new pet fish. Unfortunately, the selection at the store wasn't very good. Exactly 90% of the fish at the store were goldfish. Trevor wanted any fish, but a goldfish. If there are 140 fish at the store, then how many fish could Trevor choose from?​

Answers

Answer: 14 fish

explanation: 90% of 140= 126 (if u use a proportion or multiply 0.9x140).

140-126=14

Answer: He has 14 other fish to choose from in the store

Step-by-step explanation:

90% ÷ 100 = .9

.9 × 140 = 126

140 - 126 = 14

please answer see the image below

Answers

Answer:

49.73

Step-by-step explanation:

total area = area of rectangle - area of circle

                = (13 x 6) - (π 3²)

                = 78 - 28.274

                = 49.73 sq. units

Find the perimeter of a rhombus whose diagonals are
30cm and 34cm
a non rh
rhombus whose
diagonals
are​

Answers

Answer:

Rhombus Side = sqr root [(34 / 2)^2 + (30 / 2)^2]

Rhombus Side = sqr root [17^2 + 15^2]

Rhombus Side = sqr root [289 + 225}

Rhombus Side = sqr root [514]

Rhombus Side = 22.6715680975

Rhombus Perimeter = side * 4 = 90.68627239  cm

Step-by-step explanation:

Makayla borrows $15200. Some is from her friend at 5% annual interest, 2 times as much as that from her bank at 8% , and the remainder from her insurance company at 4%. She pays a total of $968 in interest for the first year. How much did she borrow from each source?

Answers

Answer:

Amount borrowed from friend = 4000

From Bank = 8000

From insurance = 3200

Step-by-step explanation:

Given that:

Amount borrowed = $15200

Let amount borrowed from friend = x

x at 5% = 0.05x

From Bank = 2x at 8% = 0.08*2x = 0.16x

From insurance = 15200 - (x + 2x) at 4%

From insurance = 15200 - 3x at 4% ; (15200 - 3x)* 0.04 = 608 - 0.12x

Interest paid in first year = $968

Simple interest = principal * rate * time

968 =

968 = (0.05x + 0.16x + 608 - 0.12x)

968 - 608 = 0.05x + 0.16x - 0.12x

360 = 0.09x

x = 360 / 0.09

x = 4000

Hence,

Amount borrowed from friend = 4000

From Bank = 2x = 4000 * 2 = 8000

From insurance = 15200 - (4000 + 8000) = 3200

What is the lease common multiple of 6 and 15

Answers

Answer:

It would be 30.

Step-by-step explanation:

estimate each product :
1/9 x 83

Answers

Answer:

8.5

Step-by-step explanation:

1/9=0.1111111111111

0.1111111111111=0.1

83=80 or 85

0.1*85=8.5

x + 1 - x = 1

Solve this equation

Please help

Answers

Answer:

x=1

Step-by-step explanation:

1+1-1=1

1+1=2

2=1=1

Answer:

[tex]x=Any\ real\ number[/tex]

Step-by-step explanation:

[tex]x+1-x=1\\1=1\\As\ x\ just\ gets\ canceled\ x\ can\ take\ any\ real\ values.[/tex]

One number is three less than a second number. Six times the first is 6 more than 3 times the second. Find the numbers.

Answers

Step-by-step explanation:

Given,

x = y - 3

Also,

6(y - 3) = 3y + 6

6y - 18 = 3y + 6

6y - 3y = 6 + 18

3y = 24

y = 24/3

y = 8

x = 8 - 3

x = 5

Therefore, the first number is 5 and the second number is 8.

60% of the shakes at The Shake Shop have protein powder in them. There are 30 shakes on the menu. How many shakes have protein powder in them?

Answers

Answer:

18

Step-by-step explanation:

Answer:

18

Step-by-step explanation:

Solve the equation
2/3x-6=9

Answers

Answer: 2/3-6=9 is equal to = − 2(2x+6)

Answer:

x = 45 over 2  or  22.5

Step-by-step explanation:

ADD 6 to both sides of the equation  SimplifyMultiply 3 by the same value to eliminate fraction denominatorsSimplifyDivide 2 by both sides of the equation by the same termSimplify

Please Help I am having one of those dumb moments.

Answers

Answer: Which of the following equations is an example of inverse variation between the values x and y?

Explanation: C

please answer the question below

Answers

Answer:

The rate of change in the submarine's elevation is 26.0 feet per second.

Step-by-step explanation:

She begins 151 feet below sea level

Thus, her initial point is y₁ = 151 feet below sea level

i.e. at t₁=0 seconds, y₁ = 151 feet below sea level

After descending for the 3 seconds, she is 229 feet below sea level.

Thus, her second point is y₂ = 229 feet below sea level after 3 seconds

i.e. at t₂=3 seconds, y₂ = 229 feet below sea level

The rate of change is basically the slope. Thus, the rate of change can be obtained by taking the slope.

slope = rate of change = (y₂ - y₁)/(t₂ - t₁)

                                      = (229 - 151) / (3 - 0)

                                       = 78/3

                                       = 26.0

Therefore, the rate of change in the submarine's elevation is 26.0 feet per second.

Use 3 for pi. I will give brainliest to whoever answers correctly

Answers

Answer:

where is the 3

Step-by-step explanation:

What is 3/7 - 1/4? .....

Answers

Answer:

Exact Form: 5/28

Decimal Form: 0.17857

please answer the image below

Answers

Answer:

301.593

Step-by-step explanation:

surface area = 2πrh + 2πr²

where r = 4 km radius

           h = 8 km

plugin values into the formula

surface area = 2πrh + 2πr²

                     = 2π (4) 8  +  2π (4)²

                     = 201.062  +  100.531

                     = 301.593 km²

-2 1/4 x 6 8/9 please help

Answers

Answer:

Step-by-step explanation:

Convert mixed fraction to improper fraction and then multiply

[tex]-2 \frac{1}{4}=- \frac{2*4+1}{4} = -\frac{9}{4}\\\\6 \frac{8}{9}= \frac{6*9+8}{9} = \frac{62}{9}\\\\-2\frac{1}{4}* 6\frac{8}{9} = \frac{-9}{4} * \frac{62}{9}\\\\= \frac{-31}{2}\\\\= -15 \frac{1}{2}[/tex]

Joe's grandma lives 36 blocks up the street from Joe. On Saturday, Joe
rode his bike two-thirds of the way to his grandma's house and then realized he
forgot the present he was going to give her. Joe rode back to his house, got the
present, and rode all the way to his grandma's house. Then he rode straight home.
How many blocks did Joe ride in all? Use labeled sketches, numbers, or words to
solve this problem. Show all your work.

Answers

Answer:

108 blocks.

Step-by-step explanation:

Joe's grandmother lives 36 blocks away from Joe.

Joe rode two thirds of the way to the house is 2/3 * 36= 24 blocks.

Then he rode back to his house (1 - 2/3) * 36= 12 blocks.

Then Joe rode back to grandma's house= 36 blocks.

Then he rode straight home= 36 blocks.

Total number of blocks he rode is 24+12+36+36= 108 blocks.

you answer 24 questions on a 100 point test correctly and earn 96%.
There are 25 questions in total, each question is worth 4 points.
Your friend earns a grade of 76%on the same test. How many questions did your friend answer correctly?

Answers

Answer:

19

Step-by-step explanation:

He gets 6 wrong and 19 correct

WILLL GIVE BRAINLEAST Name a positive or negative number to represent each situation.
1. depositing $85 in a bank account ____

Answers

$85 will be in your account

I think the answer would be +85 or just 85 because deposit means to add something so I am pretty sure it would be +85.  

Brainliest if you can help and provide an answer plus explanation :)

Q: How much money would you save on 10 pounds of blueberries at the less expensive fruit stand? (Hint: Find the cost of 10 pounds of blueberries for each, A and B, then subtract the values.) Remember to explain your reasoning!

Answers

Answer:

According to my...calculations, you would save $20.

Step-by-step explanation:

You have to find the ratio/the rate of change, then you multiply it to get to ten pounds. You do the same for the other line. Then you just subtract it.

A= 2 pounds for $12

B= 1 pound for $4

Multiply the two to get to 10, and whatever the number is (5) you multiply 12 by it as well. For B, you multiply by 10. You get $60, for A. $40 for B.

The amount saved would be $20.

Which is the correct equation to find the value of X?

Answers

Answer:

The answer would be X=12

Answer:

8x-17 = 5x+19

Step-by-step explanation:

Assuming the two lines that are slightly horizontal are parallel and a straight line cuts through it, both angles should be corresponding angles and they are equal. Thus, 8x-17 = 5x+19.

A person is studying the relationship between temperature and mental ability. So,
she devised a test in which a group of 10 mice are timed as they run through a maze
which leads to food and water. The researcher repeats the test 3 times with each
group to see how much they improve and she uses three groups.
• Group 'A', does the test under normal room temperature of 76°F.
• Group 'B', does the test in the cold at a temperature of 45°F.
• Group 'C', does the test under a hot temperature of 105°F.
How would you most correctly describe Group 'A' in a statistical study?

Answers

Answer:

Group A is a Control Group

Step-by-step explanation:

What is an equation of the line that passes through the points (0, -1) and (6, 1)? Put your answer in fully reduced form

Answers

Y=1/3x-1 is the correct answer in slope intercept form:)

Function f is defined by the equation f(x)=x2
What is f(3)

Answers

6 because f(x) means y
So y=x multiplied by 2
so when x is 3
3 times 2 is 6
Y=6

F(3)=6

What does -3/8 x 3/5 x -5/6 equal

Answers

It equals 3/16 because I first multiplied the first to fractions together and I know that negative times a positive is negative so we would get a negative and I also multiplied the 2 to get -9/40 and then multiplied -5/6  to -9/40 to get the answer of 3/16!

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