Mathematics High School

Prove cot(− θ) =− cot(θ)

Answers

Answer 1

Step-by-step explanation:

steps are in the picture.

Note:If you need to ask question about it ,i can make you understand.thanks

Related Questions

Solve the equation. Check your answer.
b - 1+ 8 = 37
b=?

Answers

b - 1 + 8 - 8 = 37- 8
b - 1 + 1 = 29 + 1
b = 30

Answer:

b = 30

Step-by-step explanation:

b - 1 + 8 = 37 (Given)

b + 7 = 37 (Simplify)

b + 7 - 7 = 37 - 7 (Subtract 7 on both sides)

b = 30 (Simplify)

Help me pls ?? 1. Suppose there is a raffle with numbered tickets 1 - 150. One ticket is randomly
drawn from a hat. Find the following probabilities:
A. Drawing an even number
B. Drawing a number greater than 100
C. Drawing an even prime number
D. Drawing a negative number

Answers

A = 50% / equally likely
B = less likely / unlikely
C =less likely
D = Impossible

can someone help me with this question

Answers

Answer: The guage block height is 4.98 m

The base of the right triangle that is formed is 7.3784 m

The last angle in the triangle is 56 degrees

Step-by-step explanation:

Redraw the triangle formed in the picture and use H for the hypotenuse, O for the block height, and A for the base. Now we can use trig (SOHCAHTOA) to find the answaers.

Using sine, we can first find the gauge block height, O (Opposite). Given the Hypotenuse (H) is 8.9 m, we can use the definition of the sine of an angle to find the height, O.

Sine(34) = Opposite/Hypotenuse (O/H), or O = H*Sine(34)

O = (8.9)*(0.5592)

O = 4.98 m, the height of the gauge block,

The base of the triangle, A, can be determined with cosine.

Cosine(34) = A/O, or A = Cosine(34)*O

A = (0.82904)*(8.9)

A = 7.3784 m

The sum of all angles in a triangle is 180 degrees.

180 = X + 34 + 90

X = 56 degrees

A rectangle has a width of 3 units. The rectangle's length is 5 times its width.

What is the area of the rectangle?

Answers

Answer:

Answer= 45 units

Step-by-step explanation:

lengths = 3 units

width = 3x5= 15 units

area= length times width= 3x15= 45 units!

Hope this helps :)

answer explerts help pleaseee show steps also

Answers

Not a, answer is C
If not understood, please let me know

hey please help i’ll give brain

Answers

Answer:

First, the dropdown is 9. Second, put in 9. The answer is 81.

Step-by-step explanation:

10* what equals 90? Well, let's do 90/10, our answer is 9. Then We are given 1 nine or 9 to put on the second slot. Our answer would be 90-9, or 81. Khan Academy is teaching you how to multiply.

Answer:

[tex]9 \times 9 = 10nines - 1nine \\ 9 \times 9 = 90 - 9 \\ 9 \times 9 = 81 \\ than \: you[/tex]

any one solve these questions will mark brainliest the last three fast plz

Answers

(iii)

35+ x + 60 = 180

95 + x = 180

x = 180 – 95

x = 85

So; X = 85° ; < PON(iV)

x + 47 + 75 = 180

x + 122 = 180

x = 180 – 120

x = 58

So; x = 58° ; < COB

(Vi)

105 ° = 3 x° –> Opposite angles ,

x = 105 / 3

x = 35

3x = 3(35) = 105°

So; x = 35°

Only the figure (V) I didn't know I'm sorry:(

I hope I helped you^_^

I NEED HELP ASAP!!! #32!!

Answers

Answer:

If it's parallel, then it has the same slope.

Find the slope from the two coordinates and compare the slope to see which ones are right.

You should get a slope of like 2/3 from the two points, so the only equation with the same slope is B.

Your answer is B.

At a bake sale there were 52 items sold total. If 24 of the items sold were cookies and the rest were brownies what is the ratio of brownies sold to cookies sold?

Answers

52=24 + b
to find b, you just subtract (52-24)
28 to 24 is our ratio
we can simplify this (just like fractions!) since both are even, let’s do it by 2!
28/2 = 14 and 24/2 = 12
simplify once more and you get our ANSWER: 7:6

A motorcycle can travel 48 miles for every gallon of gas used
Use the unit rate to complete the table for the miles traveled by motorcycle

Answers

Answer:

A-96

B-144

C-192

:) have a nice rest of your day!

Step-by-step explanation:

A mobile device that normally sells for $99.90 is
marked down 10%. What's the discount price?
$99.00
$89.99
$89.91
$89.90

Answers

Answer:

89.90 is the answerrrrrrrrrrr

Answer:

89.91

Step-by-step explanation:

You can do this with a calculator 99.90-10%

-2x - 4 > 8 how much is this

Answers

[tex]\\ \sf\longmapsto -2x-4>8[/tex]

[tex]\\ \sf\longmapsto -2(x+4)>8[/tex]

[tex]\\ \sf\longmapsto x+4>\dfrac{8}{-2}[/tex]

[tex]\\ \sf\longmapsto x+4>-4[/tex]

[tex]\\ \sf\longmapsto x>-4-4[/tex]

[tex]\\ \sf\longmapsto x>-8[/tex]

Answer:

x < -6

Step-by-step explanation:

-2x - 4 > 8

Add 4 on both sides

-2x > 12

Divide -2 on both sides

x < -6

Hope this helps!

Find the value of this expression if x - -7.
x2 - 1
x+4
Enter the correct answer

Answers

here are the answers in order
a. -15
b. -3

rachel states that -5.5 is an integer because it is negative. is she correct? why or why not?

Answers

Answer:

Step-by-step explanation:

-5.5=-55/10=-11/2

-11/2 is not an integer because it is not a whole number. even if it is negative, as long as it is in fraction form it is not an integer. therefore rachel is not correct

Is 0.62473 a member of the set? For each set of real numbers, select yes or no

Answers

Step-by-step explanation:

can't see the opinions

The perimeter of a triangle is 16 squar root 7 feet if two of the sides measure 343 square root feet amd 175 square root fins the length of the third side as a redo all in simplest form

Answers

The length of the third side is 4 7step-by-step the explanation- the perimeter of a triangle is 16 to the square root of 7 feet.

Answer:19

Step-by-step explanation:

because if it added it becomes that

In the expression "4f + s", the letter "s" is: *

Answers

Answer:

Step-by-step explanation:

A variable

3/2 x -6

hahshdnndndndjd

Answers

I believe that the answer is -9

All of the following are rational numbers except____.

Answers

Answer:

3.14159

Explanation:

pi is irrational

Hope this helps!! <3

Hakim and Aziz had some savings in the ratio 3 : 5. Hakim saved another $82 and Aziz spent $110. Both have the same amount of money now. How much do each of them have now?

Answers

Answer: $370

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

Explanation:

Hakim and Aziz have savings in the ratio 3:5. This means that Hakim has 3x dollars while Aziz has 5x dollars. The x is some positive real number.

We're then told that Hakim saved another $82, which means it goes from 3x to 3x+82

At the same time, Aziz spent $110 which means the 5x decreases to 5x-110

At this point, the two people have the same amount of money. Set the expressions we found equal to one another and solve for x.

3x+82 = 5x-110

3x-5x = -110-82

-2x = -192

x = -192/(-2)

x = 96

Then use this x value to compute each expression like so

3x+82 = 3*96+82 = 3705x-110 = 5*96-110 = 370

Both have $370 after Hakim saved that additional $82 and after Aziz spent that $110.

------------------

Extra info:

If we rewind things a bit, Hakim would have 3*x = 3*96 = 288 dollars while Aziz would have 5x = 5*96 = 480 dollars. This is before any additional saving or spending.

Then note how the ratio 288:480 fully reduces to 3:5 after dividing both parts by the GCF 96.

the expression x - 0.10 X gives the cost of an item that is discounted 10% write this expression in the other way

Answers

Answer:

Step-by-step explanation:

Take out a common factor (x)

x ( 1 - 0.10 )

Now do the subtraction

0.90x

giải phương trình :
-4x-8x>0

Answers

Answer:

[tex]x < 0[/tex]

Step-by-step explanation:

[tex] - 4x - 8x > 0[/tex]

➡️ [tex] - 12x > 0[/tex]

➡️ [tex]x < 0[/tex]

What is the length of BC?

Select the best answer from the choices provided.
A.4
B.4v2
C.8v2
D.16

Answers

8 squared = x squared + x squared.
64= 2 x squared
Divide both sides by 2
32= x squared
Square root of 32= x
4 square root 2

How do I solve this

Answers

Answer:

it's 67

Step-by-step explanation:

the base is already same.

-9 + (-8) - (-7) = -10

= m^-10

The midpoint of AB is M(3,-2). If the coordinates of A are (1, -3),
what are the coordinates of B?

Answers

Answer:

23 just took the test

Step-by-step explanation:

Answer:

B(5,-1)

Step-by-step explanation:

The formula for finding the midpoint of any line is: [ (x1+x2) / 2 ] , [ (y1+y2) / 2 ] .

So, x1=1 and x2=x. And y1=-3 and y2=y.

So,

(1+x)/2=3, then manipulating it gives x=5.

And,

(-3+y)/2=-2, then manipulating the equation gives y=-1.

Hence B(5,-1)

What is the equation of the line that passes through the point (4, -7) and has a
slope of – } ?
Answer:
Submit Answer
PLS HELP ASAP

Answers

Answer:

I think that some information is missing? what is the slope?

If you are trying to say that there is NO SLOPE then the

answer is " x = 4 "

Step-by-step explanation:

A popular amusement park has had199,792,458 visitors since it opened. Which
number, written in scientific notation, is the
best approximation of the number of visitors?
a) 0.2 x 107 visitors
b) 0.2 x 108 visitors
c) 2.0 x 107 visitors
d) 2.0 x 108 visitors

Answers

Answer:

d) 2.0 * 10⁸

Step-by-step explanation:

199,792,458 ≈ 200,000,000 = 2.0* 10⁸

Can someone help with this !!

Answers

Answer:

[tex]{ \sf{ {(2x - 3)}^{4} }} \\ = { \sf{ {(2x - 3)}^{2} . {(2x - 3)}^{2} }} \\ = { \sf{(4 {x}^{2} - 12x + 9)(4 {x}^{2} - 12x + 9) }} \\ = { \sf{ {16x}^{4} - 48 {x}^{3} + 36 {x}^{2} - 48 {x}^{3} + 144 {x}^{2} - 108x + 48 {x}^{2} - 108x + 81 }} \\ { \sf{ = {16x}^{4} - 96 {x}^{3} + 228 {x}^{2} - 216x + 81 }}[/tex]

Five times the sum of a number and 7 is 8

Answers

Answer:

5(n+7) = 8

Step-by-step explanation:

this is the equation you are look for if its the value of n it would be -27/5

Answer:

Step-by-step explanation:

5(x + 7) = 8

x + 7 = 8/5

x = 8/5 - 7 = -27/5 = -5.4

Simplify: 2(a-4)+15=13

Answers

Answer:

a = 3

Step-by-step explanation:

2(a−4)+15=132

a−8+15=132

a=13−15+82

a=6

a=6/2

a=3

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