help please!
I need to prove this using identities
show all steps

cos(pi/2+x)/cos(pi+x)=tanx​

Answers

Answer 1

Answer:  see proof below

Step-by-step explanation:

Use the Sum & Difference Identity: cos (A + B) = cos A · cos B - sin A · sin B

Recall the following from Unit Circle: cos (π/2) = 0, sin (π/2) = 1

                                                              cos (π) = -1,   sin (π) = 0    

Use the Quotient Identity:   [tex]\tan A=\dfrac{\sin A}{\cos A}[/tex]

Proof LHS → RHS:

[tex]\text{LHS:}\qquad \qquad \dfrac{\cos \bigg(\dfrac{\pi}{2}+x\bigg)}{\cos \bigg(\pi +x\bigg)}[/tex]

[tex]\text{Sum Difference:}\qquad \dfrac{\cos \dfrac{\pi}{2}\cdot \cos x-\sin \dfrac{\pi}{2}\cdot \sin x}{\cos \pi \cdot \cos x-\sin \pi \cdot \sin x}[/tex]

[tex]\text{Unit Circle:}\qquad \qquad \dfrac{0\cdot \cos x-1\cdot \sin x}{-1\cdot \cos x-0\cdot \sin x}[/tex]

                            [tex]=\dfrac{-\sin x}{-\cos x}[/tex]

Quotient:                 tan x

LHS = RHS [tex]\checkmark[/tex]

Help Please!I Need To Prove This Using Identities Show All Stepscos(pi/2+x)/cos(pi+x)=tanx

Related Questions

plss help me plss #4​

Answers

Hey there!

Step 1: we multiply 5 by 1/4

=> [tex]5 ÷ \frac{1}{4} [/tex]

=> 5 ×[tex]\frac{4}{1} [/tex]

=> 20

Answer:

20 lengths

explanation:

total length of swine: 5 m

each length: [tex]\sf \frac{1}{4}[/tex] m

amount of lengths:

5 ÷ [tex]\sf \frac{1}{4}[/tex]     [ division number sentence ]

5 * 4

20

20 such length can be made.

Find the value of x in the triangle shown below 6 2

Answers

Answer:

B.

Step-by-step explanation:

use the pythagorean theorem

a^2+b^2=c^2

2^2+x^2=6^2

4+x^2=36

-4        -4

x^2=36

√x=√36

x=√36

Simplest form of 6 3/8 + 7 5/6 =

Answers

Step-by-step explanation:

first, add the whole numbers

6 + 7 = 13

then the fractions

3/8 + 5/6

we need to get common denominators

do you know how to do that

Which of these is a counterexample to the conditional statement, "If a number ends in the digit 5, then it is divisible by 3"

Answers

Answer:

5 times 3 is 15 and if you divide 3 by 15 you answer will be 5

Step-by-step explanation:

What must be a factor of the polynomial function f(x) graphed on the coordinate plane below?
A) x – 6
B) x – 3
C) x + 1
D) x + 6

Answers

Answer:

D. x + 6

Step-by-step explanation:

In the given graph, we have 3 x-intercepts values, which are points at which the line intercepts the x-axis. They are, -6, -3 and 0.

Each of these x-intercepts can be written as a factor of a polynomial function as follows:

x = -6

x = -6 + 6

x + 6 = 0

x = -3

x = -3 + 3

x + 3 = 0

x = 0

Therefore, the factor of the polynomial function must be: x + 6

F(x)=-14/x^2 average rate

Answers

Answer:

I am assuming that the function is f(x)=20(14)x, if it is

then f(x)=280x , The average rate of change between x =1 and x=2

is the slope of the function between the 2 and 1

Average rate of change = [f(b)-f(a)/b-a]  let a and b be x and y

f(a)=f(x)=f(1)=280x1=280

f(b)=f(y)=f(2)=280x2=560

Average rate of change = [f(b)-f(a)/b-a]=[(560-280)/(2-1)]=280

There is no decimal unless the function given is wrong

Step-by-step explanation:

This figure represents a model ramp that is being covered with nonslip material on all sides.

How much nonslip material is needed to cover the ramp?


A. 216 in²

B. 240 in²

C. 264 in²

D. 278 in²

Answers

The surface area of the given ramp is 264 in²

How to calculate the surface area of the ramp

The given ramp is a triangular based prism is calculated as;

Surface area = Area of all the faces of the prism

Surface area = 2[0.5(8*6)] + (6*9) + (9*10) + (8*9)

Surface area = 48 + 54 + 90 + 72

Surface area = 264 in²

Hence the surface area of the given ramp is 264 in²

Learn more on surface area here: https://brainly.com/question/16519513

Answer:

264

Step-by-step explanation:

3(2x−7)+ 1/3 (7x+2)
Please help Quick

Answers

simplified answer 25x-61/3

Enter the mixed number as an improper fraction.
2 1/4

Answers

Answer:

9/4

Step-by-step explanation:

an unknown or changeable quantity is called​

Answers

Answer: variable

The term varies or changes, and often there are restrictions set on the variable (eg: x is positive). Think of a variable as a placeholder for a number.

How did the Fugitive Slave Act of 1850 affect enslavement?

It stopped enslavers from looking for people who had run away.

It give citizenship to any enslaved person who ran away to a free state.

It punished people who helped enslaved people escape.

It allowed enslaved persons the right to trial by jury.

Answers

The Fugitive Slave Act of 1850 affect enslavement is one that stopped enslavers from looking for people who had run away.

What was the impact of the Fugitive Slave Act of 1850?

This Act was said to have hinder enslavers from searching for people who had run away.

It was said to have given citizenship to any kind of enslaved person that has ran away to a free state. It also punished individuals that helped enslaved people escape. This law was passed on September 18, 1850.

Learn more about  Fugitive Slave Act from

https://brainly.com/question/542501

1)
Which of the following is an example of mistaking correlation for causation?
A. Running more frequently causes you to buy more running shoes.
B. Living in a Spanish-speaking country causes you to do poorly on the AP
English exam
C. Not going to school causes you to do poorly on the AP English exam.
D. Running more frequently causes you to buy more running outfits.
ОА
OB
Ос
OD
HINT
SUBMIT
2)

Answers

C

because The rate of kids that do attend, work more efficiently

Blood GroupO A B ABEthnic Group 1)0.082 0.101 0.005 0.0042)0.140 0.141 0.018 0.0093)0.215 0.195 0.070 0.020Explain in context what each of these probabilities represents. (Select all that apply.)If we know that the individual came from ethnic group 3, the probability that he has type A is given by P(A | C).If we know that the individual came from ethnic group 3, the probability that he has type A is given by P(C | A).If a person has type B blood, the probability that he is from ethnic group 3 is given by P(C | A).If a person has type A blood, the probability that he is from ethnic group 3 is given by P(C | A).If a person has type A blood, the probability that he is from ethnic group 3 is given by P(A | C).If a person has type B blood, the probability that he is from ethnic group 3 is given by P(A | C).

Answers

Answer:

P (A|C) = 0.39

P (C|A) = 0.446

Step-by-step explanation:

The data provided is as follows:

                                              Blood Group

                                  O           A            B           AB         Total

                         1)    0.082    0.101     0.005     0.004     0.192

Ethnic Group   2)    0.140     0.141      0.018     0.009     0.578

                        3)    0.215     0.195     0.070     0.020    0.500

      Total                0.437     0.437     0.093     0.033

The event C = {Ethnic group 3 is selected}

Compute the value of P (A|C) as follows:

[tex]P(A|C)=\frac{P(A\cap C)}{P(C)}=\frac{0.195}{0.5}=0.39[/tex]

If we know that the individual came from ethnic group 3, the probability that he has type A is given by P(A | C) = 0.39.

Compute the value of P (C|A) as follows:

[tex]P(C|A)=\frac{P(A\cap C)}{P(A)}=\frac{0.195}{0.437}=0.446[/tex]

If we know that the individual has type A blood group, the probability that he came from ethnic group 3 is given by P(C | A) = 0.446.

solve the inequality −23s ≥6 s=−9

Answers

Answer:

Given:

s = -9

We exchange this value into our inequality;

-23s  ≥ 6

-23(-9) ≥ 6

207 ≥ 6

If 1 m = 100 cm, how many centimeters are in 17 meters?


If 1 m = 100 cm, how many centimeters are in 17 meters?

Answers

Answer:

It would be 1,700

Step-by-step explanation:

It's simple: just add 2 zeros onto whatever the meter amount is and change the label to cm!

.please help meeeeeee​

Answers

5. 44

6. 1.84 x 10^3

7. 104

8. 567

9. 23

You pull out the plug from the bathtub. After 40 seconds, there are 13 gallons of water left in the tub. One minute after you pull the plug, there are 10 gallons left.

Assume that the number of gallons varies linearly with the time since the plug was pulled.


Write the particular equation expressing the number of gallons (g) left in the tub in terms of the number of seconds (s) since you pulled the plug.​

Answers

Answer:

g = -3/20s + 19

Step-by-step explanation:

Let's assume this is a function

The points are

(40, 13) and (60, 10)

Since it is linear relation, we'll get the slope intercept form

g = ms + b, where g- number of gallons, s- time in seconds, b- y intercept

Using the points, let's calculate the formula

m = (10 - 13)/(60 - 40) = -3/2010 = -3/20*60 + b10 = - 9 + bb = 19

So the formula is:

g = -3/20s + 19

find 3 consecutive integers if three times the first integer is two times the third.

Answers

Answer:

4, 5, and 6

Step-by-step explanation:

Three Consecutive integers are x, x+1, x+2

We are given 3 times the first integer is 2 times the third

So

3x = 2(x+2)

Solve for x

3x = 2x+4

x = 4 (first integer)

so the 3 integers are 4, 5, and 6

The side length of one cube is 4 cm.
What is the volume of one cube?

Answers

Answer:

64 cm³

Step-by-step explanation:

Volume of cube

[tex] = \textcolor{steelblue}{\text{side}\times{\text{side} } \times\text{side}}[/tex]

[tex] = \textcolor{steelblue}{\text{side} {}^{3} }[/tex]

Given that the side is 4cm,

volume of cube

= 4³

[tex] = \textcolor{red}{64 \: \text{cm} {}^{3} }[/tex]

13.026 in decimal form

Answers

Answer:

Write 13.026 as  

13.026

1

Multiply both numerator and denominator by 10 for every number after the decimal point

13.026 × 1000

1 × 1000

=  

13026

1000

Reducing the fraction gives

6513/500

Step-by-step explanation:

1 + 16 = distance squared

Answers

Distance = √(17) Because 1 + 16 = 17

17 is the answer, it’s 17 by adding 1 + 16 eventually, it gives the answer 17.

2. Peter drew two rays, AC and AP with A as a common endpoint. Which of the following statements
might describe Peter's drawing?
1.
II.
AC and AP are parallel.
PAC is an angle
AC and AP are perpendicular
III.
A. I and 11
B. II and I
C. I and 111
D. I, II, and III

Answers

Complete question is;

Peter drew two rays, AC and AP with A as a common endpoint. Which of the following statements

might describe Peter's drawing?

I. AC and AP are parallel.

II. PAC is an angle

III. AC and AP are perpendicular

A. I and II

B. II and III

C. I and 111

D. I, II, and III

Answer:

Option B: II & III

Step-by-step explanation:

We are told that Peter drew two rays which are AC and AP.

We are told that A is a common endpoint.

If A is a common endpoint, it means the 2 rays interaction point at A is at an angle.

The angle could also be 90° which means it's possible that the rays AC and AP are perpendicular.

Thus, the correct statements that describe his drawing are: II & III

6/100+5/10+6/x+3=3.62​ solve for the value of x

Answers

3/50 + 1/2 + 6/x + 3 = 3.62

Find the product.



A.
3x2 − 11x − 20
B.
3x2 − 20x
C.
3x2 − x − 20
D.
3x2 − 3x − 60

Answers

Answer:

A. -1. (27)

B. 0.3

C. -14

D. -18

Step-by-step explanation:

I just use the calculator

. Day before today Tuesday.

Answers

Well that would be Monday…
What…….it was Saturday basically

B(c) is a function

True

or
False ​

Answers

Answer:  False :)

Step-by-step explanation:

If y equals three what is the value of 5Y + 6

Answers

Answer:

21

Step-by-step explanation:

If y = 3 then multiply 5 x 3=15. Add 6 and you get 21. 21 is the correct answer.

Please please please help!!!!

Answers

I will start off by defining the angle

[tex] \alpha = 90 - \beta [/tex]

as being the angle between altitude and the hypotenuse of the triangle.

[tex] \alpha = 90 - 30.1 = 59.9[/tex]

Using trigonometry, and the definition of the tan function defined by

[tex] \tan( \alpha ) = \frac{opp}{adj} = \frac{x}{1836.3} [/tex]

[tex] \tan( 59.9 ) = \frac{x}{1836.3} [/tex]

[tex]x = 1836.3 \times \tan(59.9) [/tex]

[tex]x = 3167.78[/tex]

Rounding to the nearest tenth

[tex]x = 3170[/tex]

find the greatest number that exactly divide 16 and 24. ind the ornatost number that diido 20 and 20 min​

Answers

Step-by-step explanation:

The greatest common factor (GCF) is the largest common factor that the numbers share. Here, 8 is the largest common factor of 16 and 24. So the GCF of 16 and 24 is 8.


Hi I really need help please help me

Answers

Answer:

B

Step-by-step explanation:

Y-intercept is where a graph crosses the y-axis at x=0

f(x) = 6x^2 + 18x + 3

f(0) = 6(0)^2 + 18(0) + 3 = 3

From the plot, g(x) at x=0 is 6.

So the answer is B. g has a greater y-intercept than f.

For f(x)

[tex]\\ \rm\rightarrowtail y=6x^2+18x+3[/tex]

Put x =0

[tex]\\ \rm\rightarrowtail y=6(0)^2+18(0)+3=3[/tex]

Y intercept at 3

From the graph

y intercept of g(x)=6

So option B is correct

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