Prove each of these identities.
a (1 + secx) (cosec x - cotx) = tan x
b (1 + sec x)(1 - cos x) = sin x tan x ​

Answers

Answer 1
Answer:

( 1 + sec x )( cosec x - cot x ) = tan x

Solving for L.H.S

[tex] \implies\quad \sf{(1+sec\:x)(cosec\:x-cot\:x) }[/tex]

[tex] \implies\quad \sf{ \left(1+\dfrac{1}{cos\:x}\right)\left(\dfrac{1}{sin\:x}-\dfrac{cos\:x}{sin\:x}\right)}[/tex]

[tex] \implies\quad \sf{ \left(\dfrac{1+cos\:x}{cos\:x}\right)\left(\dfrac{1-cos\:x}{sin\:x}\right)}[/tex]

[tex] \implies\quad \sf{ \left(\dfrac{1-cos^2 x}{cos\:x.sin\:x}\right)}[/tex]

[tex] \implies\quad \sf{ \left( \dfrac{sin^2 x}{cos\:x.sin\:x}\right)}[/tex]

[tex] \implies\quad \sf{ \left( \dfrac{sin\:x.\cancel{sin\:x}}{cos\:x.\cancel{sin\:x}}\right)}[/tex]

[tex] \implies\quad \sf{\left( \dfrac{sin\:x}{cos\:x}\right) }[/tex]

[tex] \implies\quad\underline{\underline{\pmb{ \sf{tan\:x}}} }[/tex]

( 1+ sec x )( 1- cos x ) = sin x. tan x

Solving for L.H.S

[tex] \implies\quad \sf{ ( 1+ sec\:x)(1-cos\:x)}[/tex]

[tex] \implies\quad \sf{\left(1+\dfrac{1}{cos\:x} \right) \left( 1-cos\:x\right)}[/tex]

[tex] \implies\quad \sf{ \left(\dfrac{cos\:x+1}{cos\:x} \right)(1-cos \:x)}[/tex]

[tex] \implies\quad \sf{\dfrac{1-cos^2 x}{cos\:x} }[/tex]

[tex] \implies\quad \sf{\dfrac{sin^2x}{cos\:x} }[/tex]

[tex] \implies\quad \sf{sin\:x.\left( \dfrac{sin\:}{cos\:x}\right) }[/tex]

[tex] \implies\quad\underline{\underline{\pmb{ \sf{sin\:x.tan\:x}}} }[/tex]


Related Questions

9168 divided by 24 long division

Answers

Answer:

382

Step-by-step explanation:

what quadrilateral is this​

Answers

" First of all, this is a hexagon which has 6 sides and 6 angles "

It is usually referred as regular Hexagon.

Answer:

Step-by-step explanation:

This is NOT a quadrilateral as the shape has 6 sides with 2 pairs of them parallel to each other.  All quadrilaterals have 4 sides instead.

Can someone help me with this question? I’ll mark you brainliest if you answer!!!

Answers

Pretty sure it’s c, sorry if I’m wrong.

HELPP FOR BRUANLEST!!!

Answers

Answer:

17/18

Step-by-step explanation:

okay this one is a bit different

you have to take the total number that are batwing-shaped (12) and the total number that are made of cotton (12) and then subtract the ones that are both batwing-shaped and made of cotton.

so 12+12-7 which is 17

then you put that over the total (18)

17/18 doesn't simplify


Seven less than the product of a number n and 1/7 is no more than 98.

Answers

Answer:
1/7(n)-7
< 98

Step-by-step explanation:

Hey!!! Can anyone help me please!

Answers

Answer:

it will not change

Step-by-step explanation:

the outlier is 3

the mode is the most occuring value in the list which is 16 before and after the 3 is removed

PLEASE HELP AS SOON AS POSSIBLE! ​

Answers

Step-by-step explanation:

(i) 240 ÷ 4000 = 0.06

(ii) 760 ÷ 4000 = 0.19

(iii) (20 + 10) ÷ 4000 = 0.0075

I guess this is the answer

i am not sure!!!!

Hello people ~
The sides of a triangle are 5, 12 & 13 units. Check if it has a right angle or not.

Answers

Step-by-step explanation:

The sides of triangle are 5,12 and 13

Here, the greatest side is 13

Therefore,

13²=5²+12²169=25+144169=169 (True)

Hence, these sides will form a right angled triangle.

[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]

To check if the triangle is congruent or not, we have to see if they form Pythagorean triplet, that is :

sum of squares of smaller sides should be equal to square of the longest side.

let's check it out ~

[tex]\qquad \sf  \dashrightarrow \: {5}^{2} + 12 {}^{2} = {13}^{2} [/tex]

[tex]\qquad \sf  \dashrightarrow \: {25}^{} + 144 = 169[/tex]

[tex]\qquad \sf  \dashrightarrow \: 169= 169[/tex]

Therefore, the sides 5, 12 and 13 forms a right angle.

I WILL GIVE 100COINS

Answers

#1

10,7.5,9,12,7.5,8

[tex]\\ \rm\Rrightarrow Mean=\dfrac{10+7.5+7.5+9+12+8}{6}=\dfrac{54}{6}=9[/tex]

#2

12,12,11.5,11.5,12.5,13

[tex]\\ \rm\Rrightarrow Mean=\dfrac{12+12+11.5+11.5+12.5+13}{6}=72.5/6\approx 12[/tex]

Circle E has a radius of 5.3 meters.

F

G

¯

is a chord and

H

E



is a perpendicular bisector of

F

G

¯

. If FG = 7.3 meters, calculate the distance of IH .

Answers

Answer:

1.46m

Step-by-step explanation:

construction ; join EF

we know that EF is a radius, so EF = 5.3m

In triangle EFH,

∡EHF = 90° (EH is the perpendicular bisector of GF)

FH = FG/2 = 7.3m / 2 = 3.65m (EH is the perpendicular bisector of GF)

According to pythagoras theorem,

FH² + EH² = EF²

3.65² + EH² = 5.3²

EH² = 5.3² - 3.65²

EH² = 28.09 - 13.32 = 14.77m

EH = √14.77m

EH = 3.84m

EI is a radius, so EI = 5.3m

IH = EI - EH

   = 5.3m - 3.84m

   = 1.46m

If jake runs 3 miles in 36 minutes how many miles could he run in 60 minutes

Answers

Answer:

5 miles

Step-by-step explanation:

We will use the method of cross multiplying and dividing.


You will multiply 60 x 3


Then, take the answer (180) and divide it by 36.


That will give you 5 and your answer.

Gas mileage is the number of miles you can drive on a gallon of gasoline. A test of a new car results in 510 miles on 20 gallons of gas. How far could you drive on 65 gallons of gas?

Answers

Answer:

The answer is 1,657.5 miles

Step-by-step explanation:

First divide 510 by 20 510 ÷ 20 = 25.5 into 65 = 1657.5

Given that test of a new car results in 510 miles on 20 gallons of gas. By unitary method, you can drive miles on 65 gallons of gas.

Unitary method is a method of solving a problem wherein to find the value of k units, you first calculate the value of one item, then multiply the value of the one item to k.

Given in the question,

distance covered in 20 gallons of gas  = 510 miles

distance covered in 1 gallons of gas  = [tex]\frac{510}{20} = 25.5[/tex] miles

distance covered in 65 gallons of gas = 25.5 * 65 miles = 1657.5 miles

Learn more about unitary method here

https://brainly.com/question/28276953

#SPJ2

HELP PLEASEEEE 24 points!! 7th grade math

Answers

Answer:

I think that A 60 and B is acute it must de a bigger 90.

Step-by-step explanation:

a ramp 19 ft long rises to a platform that is 17 ft off the ground. Find x, the angle of elevation of the ramp

Answers

We can use the sine of the triangle to solve for the angle.
sin
θ
=
18
20
θ
=
sin

1
(
18
20
)
θ
=
64.16
o

Can anyone solve this?

Answers

Answer:

x = 8cm

Step-by-step explanation:

x = 3cm + 5cmx = 8cm

#IhopeThisHelp

There are 36 squares on each red and white checkered tablecloth. How many squares are there on 7,011 tablecloths

Answers

Answer:

36 squares per table cloth, so;

36 x 7,011 = 252,396, there are 252,396 squares.

Since there are 7011 tablecloths and 36 squares on each one, you would need to multiply 7011 by 36 to get 252,396. So there are 252,396 squares on 7011 tablecloths.

Jasmine bought a 4 kg block for modeling clay she wants to divide it into eight equal blocks what will the mass of each block in grams

Answers

Answer:

The mass of each block is 500 grams.

Step-by-step explanation:

4 kg = 4000 grams

Now we divide,
4000 / 8 = 500

Our final answer should be 500.

Select the correct answer. Consider the function f(x) = 10x and the function g(x) shown below. How will the graph of g(x) differ from the graph of f(x)? A. The graph of g(x) is the graph of f(x) shifted up by a factor of . B. The graph of g(x) is the graph of f(x) compressed vertically by a factor of . C. The graph of g(x) is the graph of f(x) stretched vertically by a factor of . D. The graph of g(x) is the graph of f(x) shifted to the right by a factor of .

Answers

Answer:

most likely 43

Step-by-step explanation:

fr.

please help me out !

Answers

Answer:

  NO

Step-by-step explanation:

Try the offered solution to see if it works

  y = 1/2x -7 . . . . for (x, y) = (-4, -5)

  -5 = 1/2(-4) -7 = -2 -7

  -5 = -9 . . . . . . false

The point does not satisfy the function. (NO)

Please read directions do number 1

Answers

Square:4*5
=20m^2

Triangle:1/2*10*5
=25m^2

PLEASE HELP!!!
What is the formula of g in terms of f?
Choose 1 answer:
A. - 1/3 f(x)
B. f(-3x)
C. -3f(x)
D. f (- 1/3x)

Answers

Answer:

A

Step-by-step explanation:

y = a f(x)

If |a| > 1 then a f(x) is f(x) stretched vertically by scale factor of a

If 0 < |a| < 1 then f(x)  is squashed vertically

If a < 0 then f(x)  is also reflected in the x-axis

y = f(ax)

If |a| > 1 then f(ax) is f(x) squashed horizontally by a scale factor of a

If 0 < |a| < 1 then f(x)  is stretched horizontally

If a < 0 then  f(x) is also reflected in the y-axis

g(x) has been squashed vertically by a scale factor of 1/3 (green on the attached diagram) and then reflected in the x-axis (red on the attached diagram)

Therefore, the solution is [tex]g(x) = -\dfrac13f(x)[/tex]

What is the value of 1/2 (4)

Answers

Answer:

2

Step-by-step explanation:

We are being asked to multiply the fraction 1/2 * 4

1/2 *4

4/2

Simplify by dividing the top and bottom by 2

2/1

2

Mrs. Adesso wants to take her class on a trip to either the science center or the natural history museum. The science center charges $7 per student, plus $75 for a guided tour. The natural history museum charges $8 per student, plus $50 for a guided tour. For what number of students is the cost of the trip the same at each museum?

Answers

Answer:

25

Step-by-step explanation:

see picture for work!

HELP 100 POINTS The population of a city is modeled with the function P=250,000e^0.013t​, where t is the number of years since 2000. In what year will the population reach ​450,000?

Answers

Pretty difficult problem, but that’s why I’m here.
First we need to identify what we’re looking for, which is t. So now plug 450k into equation and solve for t.
450000 = 250000e^0.013t
Now to solve this, we need to remember this rule: if you take natural log of e you can remove x from exponent. And natural log of e is 1.
Basically ln(e^x) = xln(e) = 1*x
So knowing this first we need to isolate e
450000/250000 = e^0.013t
1.8 = e^0.013t
Now take natural log of both
Ln(1.8) = ln(e^0.013t)
Ln(1.8) = 0.013t*ln(e)
Ln(1.8) = 0.013t * 1
Now solve for t
Ln(1.8)/0.013 = t
T= 45.21435 years
Now just to check our work plug that into original equation which we get:
449999.94 which is basically 500k (just with an error caused by lack of decimals)
So our final solution will be in the 45th year after about 2 and a half months it will reach 450k people.

Twelve disks with the given measurements are stacked on top of each other. Which expression does NOT give the volume of the cylinder that is formed?

Answers

Answer:

The answer is the top right corner. (pi* 3* 12^2)

I did this in TTM

Answer:

π⋅3⋅12^2

Step-by-step explanation:

5(b + 3)

I think that this question is really hard for some reason

Answers

Answer: 5(b+3) is b = 3


Step-by-step explanation:

1)
    5(b+3)      - distribute

2)     5b = 15    

3)    
[tex]\frac{5b}{5} =\frac{15}{5}[/tex]     - divide

4)      b = 3       - solution

Which expression represents the value, in dollars, of a certain number of quarters, q, and dimes, d?

0.35qd
0.35q + d
0.10q + 0.25d
0.25q + 0.10d

I am in middle school.

Answers

C because q equals the quarters and d equals the dimes

Describe a system of equations that has infinitely many solutions.

Linear equations

Answers

Answer:

when the lines are coincident, and they have the same y-intercept

Step-by-step explanation:

A real estate builder wishes to determine how house size (House) is influenced by family income (Income), family size (Size), and education of the head of household (School). House size is measured in hundreds of square feet, income is measured in thousands of dollars, and education is in years. The builder randomly selected 50 families and ran the multiple regression. The business literature involving human capital shows that education influences an individual’s annual income. Combined, these may influence family size. With this in mind, what should the real estate builder be particularly concerned with when analyzing the multiple regression model?

Answers

When analyzing the multiple regression model, the real estate builder should be concerned with Multicollinearity.

What is Multicollinearity?

This is a phenomenon in regression analysis where some of the independent variables are correlated. This can present an issue because the correlation leads to less reliable results.

The income in this research is influenced by the education and they both influence family size. There is therefore an issue of multicollinearity here because some variables are correlated.

Find out more on Multicollinearity at https://brainly.com/question/16021902.

How many solutions does the system of equations in the graph have? Help ASAP!

Answers

Answer:

There is one solution.

Step-by-step explanation:

There is one intersection.

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