In a right triangle ABC, C is the right angle. What does cosB equal?
1. SinB
2. SinA
3. CosA
4. Not enough info

Answers

Answer 1

Given that,

ABC is a right angle triangle, C is the right angle.

To find,

cosB = ?

Solution,

The sum of angle of a triangle is equal to 180 degrees. So,

∠A + ∠B + ∠C = 180°

Put ∠C = 90°

∠A + ∠B + 90° = 180°

∠A + ∠B = 90°

Taking cos with each term.

cosA+cosB = cos (90)

cosA+cosB = 0

cosB=-sinA

Hence, cosB = sinA.


Related Questions

Write an algebraic expression for the phrase 6 times Z

Answers

Answer:

6z

Step-by-step explanation:

The answer would be 6z = y


A circle is cut in half and removed. What is the approximate area (shaded region) of the remaining portion of the circle in square feet? There is a picture of a circle with a line through the middle showing 12 feet.
12 feet ( A=pie(3.14)r^2)
Options are: A. 60 ft2 B. 120 ft2 C. 225 ft2 D. 450 ft2

Answers

Answer:

Step-by-step explanation:

area of a whole circle is pi [tex]r^{2}[/tex]

diameter is 2*r

1/2 * pi * [tex]6^{2}[/tex]   will find the area of 1/2 of the circle that has a diameter of 12'

56.54866 '

so approx  60 ft

Jake says that there should be a decimal point in the quotient 142.45 ÷ 7.4 = 1,925 after the 2.

Part A
Which equation shows the best estimate for the quotient?
A. 150 ÷ 10 = 15
B. 150 ÷ 5 = 30
C. 140 ÷ 10 = 14
D. 140 ÷ 7 = 20
Part B
Use the drop-down menus to explain whether Jake is correct.
Jake
Choose...
correct because 192.5
Choose...
close to the estimate. The decimal point belongs after the
Choose...
.

Answers

Answer:

ok

Step-by-step explanation:

2. (3.7) and (2.3) 7
I WILL MARK BRAINLIEst pls HELP MEEE

Answers

Answer:

associative, commutative, no, multipolication by 1 (don know what that is called),  commutative, no, adding by 0, no

Step-by-step explanation:

3 and 6 are no because subtraction is not associative

and 8, well 0+12 is not 0

plz hellp me plzzzzzzzzzz​

Answers

Answer:

3n+6

Step-by-step explanation:

Find the slope intercept equation of the line

Answers

Answer:

Y=2x-2

Step-by-step explanation:

Slope intercept form is also known as y=mx+b

The slope of a line is rise over run. In this case that would be 2/1 which simplifies to 2

The intercept is where the line crosses the y axis, which is at -2

So your equation would be y=2x-2

This should be the format of your answer:
Ex. Given: distance = 500 m/s
time = 10 s
Asked: speed
Formula: d/t
Solution: 500 m/10 s
Answer: 50 m/s

2. The new Ferrari can accelerate from rest to 100 km/hr in 5 seconds. What is the average acceleration of the car in m/s2?
3. A car starts from a stoplight and is traveling with a velocity of 10 m/sec east in 20 seconds. What is the acceleration of the car?
4. A ball is rolled at a velocity of 12 m/s. After 36 seconds, it comes to a stop. What is the acceleration of the ball?

Answers

Answer:

The answer is below

Step-by-step explanation:

Acceleration is the time rate of change in velocity. Acceleration is given by:

Acceleration = change in velocity / time taken

Acceleration = (final velocity - initial velocity) / time

1) The Ferrari is from rest, hence initial velocity = 0. The final velocity = 100 km/h = [tex]\frac{100\ km*1000\ \frac{m}{km} }{1\ hr*\frac{3600\ s}{1\ hr} } =27.78\ m/s[/tex], time = 5 s

Acceleration = (0 - 27.78) / 5 = 5.56 m/s²

2) The car has initial velocity = 10 m/s. The final velocity = 10 m/s since velocity is constant. time = 20 s

Acceleration = (10 - 10) / 20 = 0 m/s²

3) The ball has initial velocity = 12 m/s. The final velocity = 0 m/s since it stops. time = 36 s

Acceleration = (0 - 12) / 36 = -0.33 m/s²

Question 1 A rectangular soccer field is 72 meters wide and 105.25 meters long. What is it's AREA? a) What operation (add, subtract, multiply or divide) would you use to solve this? b) How did you know? ​

Answers

Answer:

1. 7578

2. Multiply

3. Because area is equal to length time width.

Step-by-step explanation:

hope this helps

The area of the soccer field would be 7,578. to get this answer you would multiply because length times width equals area

Hey what is 1x2+4 +5

Answers

Answer:

11....................

Answer:

11

Step-by-step explanation:

Which sequence of transformations takes A to its image A'?
A. a translation 1 unit down followed by a reflection in the x-axis
B. a reflection in the x-axis, followed by a translation 1 unit down
C. a translation 3 units to the left, followed by a clockwise rotation 180 about the origin
D. a reflection in the y-axis, followed by a clockwise rotation 180 about the origin

Answers

Answer:

a

Step-by-step explanation:

hope this help mark me brainlist plz

The correct sequence of transformations takes A to its image A' is,

⇒ A translation 1 unit down followed by a reflection in the x-axis.

What is mean by Translation?

A transformation that occurs when a figure is moved from one location to another location without changing its size or shape is called translation.

We have to given that;

The sequence of transformations takes A to its image A'.

Now, We have;

The coordinate of A are (4, 5)

And, The coordinate of A' are (4, - 4)

Hence, The correct sequence of transformations takes A to its image A' is,

⇒ A translation 1 unit down followed by a reflection in the x-axis.

Learn more about the transformation visit:

https://brainly.com/question/30097107

#SPJ3

2. aubrey solves the equation x-4 = 4 - x and shows her work she found that x = 4 and x = 5 what mistake did she make what is the correct answer

3. photo for reference

Answers

Answer: x doesn't equal four x would have to equal -5 because it cant before because it would be a zero and there would be no solution

Step-by-step explanation: brainliest plz

PLEASE HELP !!!!! WILL GIVE POINTS !!!!! (√a)=k√a where k=a^n. Find the value of n.

Answers

Answer:

im here for the points

Step-by-step explanation:

im here for the points

I GIVVVVEEE BRAINLILST I NEED HELPP

Answers

Answer:

The answer is J,

it can't be H because that would increase the size by 10, when the problem describes a reduction. and it cant be F or G because it has the x and y values in the wrong spots.

Step-by-step explanation:

I hope this helped :)

-18=-5x-(-2) what is x?

Answers

Answer:

x = 4

Step-by-step explanation:

-18 = -5x-(-2)

i) when there is a '-' sign in front of an expression in parentheses, change the sign of each term in the expression

-18 = -5x+2

ii) move -5x to the left-hand side and change its sign

5x-18 = 2

iii) move -18 to the right-hand side and change its sign

5x = 2+18

iv) add the numbers

5x = 20

v) divide both sides of the equation by 5

[tex] \frac{5x}{5} = \frac{20}{5} [/tex]

[tex]x = 4[/tex]


5
12
of the pupils in Year 9 say their favourite colour is red.
There are 180 pupils in Year 9.
How many students said red is their favourite colour?

Answers

Red

⁣           
    
    

Doing my homework!
✏️✏️✏️✏️

PLEASE HELP WILL MARK BRAINLEIST

Answers

Answer:

I belive it's Y = 3/2x - 1

At 8:00 Aam the temperture is 53 at 11:00 Am it is 69

Answers

Answer:

what is the question?

Step-by-step explanation:

all u have is the numbers

Solve this pls. Thank you

Answers

Answer:

which one????????????????????

Ryan had some candy to give to his five children. He first took eight pieces for
himself and then evenly divided the rest among his children. Each child received four pieces. With how many pieces did he
start?

Answers

Answer:

28 pieces

Step-by-step explanation:

5 kids x 4 pieces = 20 pieces

20 + dad's 8 pieces = 28 pieces of candy

He has 5 children and each get for so = 20 + his 8 which equals 28

Which point below would you use with the point (-2,-5) to get a line with a slope of -1?
A. (4,1)
B. (1.4)
C. (-6, 1)
D. (-1,-6)

Answers

Answer:

(D): (-1,-6)

Step-by-step explanation:

Given

[tex](x_1,y_1) = (-2,-5)[/tex]

[tex]m = -1[/tex]

Required

Find [tex](x_2,y_2)[/tex]

Slope (m) is calculated using:

[tex]m = \frac{y_2 -y_1}{x_2 - x_1}[/tex]

Substitute values for m, x1 and x2

[tex]-1 = \frac{y_2 -(-5)}{x_2 - (-2)}[/tex]

[tex]-1 = \frac{y_2 +5}{x_2 +2}[/tex]

Cross Multiply:

[tex]-1(x_2 +2) = y_2 +5[/tex]

[tex]-x_2 -2 = y_2 +5[/tex]

Make y the subject

[tex]y_2 = -x_2 - 2 - 5[/tex]

[tex]y_2 = -x_2 - 7[/tex]

Only (D): (-1,-6) satisfy this condition:

Substitute -1 for x2 and -6 for y2.

[tex]-6 = -(-1) - 7[/tex]

[tex]-6 = 1- 7[/tex]

[tex]-6 =- 6[/tex]

Hence:

(D): (-1,-6) is true

d.
T:
125 hrs
C. Lisa walks at an average speed of
6 km/h for 1 hours.
Dan completes the same distance in
of an hour.
Calculate Dan's average speed.

Answers

Question:

Lisa walks at an average speed of  6 km/h for 15 hours.

Dan completes the same distance in  an hour.  Calculate Dan's average speed.​

Answer:

[tex]Speed = 90km/hr[/tex]

Step-by-step explanation:

Given

Lisa:

[tex]Speed = 6km/hr[/tex]

[tex]Time = 15\ hr[/tex]

First, we calculate the distance covered by Lisa:

[tex]Distance = Speed * Time[/tex]

[tex]Distance = 6km/hr * 15\ hr[/tex]

[tex]Distance = 90km[/tex]

So, Dan distance can be represented as:

[tex]Distance = 90km[/tex] --- Dan completes the same distance as Lisa

[tex]Time = 1\ hr[/tex] -- Time to complete the distance

Dan's average speed is:

[tex]Speed = \frac{Distance}{Time}[/tex]

[tex]Speed = \frac{90km}{1\ hr}[/tex]

[tex]Speed = 90km/hr[/tex]

Hence, Dan's average speed is 90km/hr

Determine the input value for which the statement
f(x) = g(x) is true.
From the graph, the input value is approximately .
f(x) = 3 and g(x) = x – 2
3 = x – 2
5 = x
The x-value at which the two functions’ values are equal is .

Answers

Answer:

The x-value at which the two functions' values are equal is 5.

Step-by-step explanation:

Let [tex]f(x) = 3[/tex] and [tex]g(x) = x-2[/tex], if [tex]f(x) = g(x)[/tex], then:

[tex]x - 2 = 3[/tex]

[tex]x = 3+2[/tex]

[tex]x = 5[/tex]

The x-value at which the two functions' values are equal is 5.

-2+(-7)= What is the answer? HELP!!!!!!!!!

Answers

Answer:

-9

Step-by-step explanation:

- 2 + ( - 7 )

- 2 - 7 = -9 ( Answer)

14.976 divided by 6 with remainder

Answers

Answer:

0

Step-by-step explanation:

it's divided evenly with no remainder

0 no remainder !! Ndnehensbebe

What is 5 -90 as a decimal

Answers

-95.00 your answer your welcome

Answer:

-0.85

Step-by-step explanation:

First you subtract 5-90

the answer is -85

then convert -85 to a decimal

the answer is -0.85

least to greatest 7.3,7 3/4,7.23,-7 2/3

Answers

-7 2/3, 7.23, 7.3, 7 3/4
-7 2/3,7.23,7.3,7 3/4

can u pls help me with this question ​

Answers

Answer:

c

Step-by-step explanation:

divide 1/5,280 and then multiply that by 6,600

Answer:

the answer is c

Step-by-step explanation:

multiply 6,600 by 1 and that will give you 6,600 again

after that you divide 6,600 and 5,280 that will get you 1.25

if you think I'm wrong just do it on the calculator it will give you 1.25

have a nice day!!

6. Andrea deposits $350 dollars in her
checking account on Tuesday. On
Wednesday she withdraws $100. On
Thursday she deposits $75. Which of the
following shows the change in Andrea's
account from Tuesday to Thursday?


Help

Answers

The change would start off as a negative and end as a positive she would end up with $425

There is 7/8 of the pretzel bag left. If one serving is 1/4 of the bag. How many servings are left? Use the model to answer the question.

Answers

Answer:

5/8

Step-by-step explanation:

What % of 25 is 15. Please help me

Answers

Answer:

15 is 60% (percent) of 25.

Step-by-step explanation:

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