Trig check my work please?

87,593 results, page 59

trig

verify the identity. cos2 x - sin2 x = 1 - 2sin2 x the 2's next to the sin and cos on the right sides are powers.

Math Trig

Find all solutions on the interval [0,2pi] for the following: 2sin^2(x)-5sin(x)=-3 cos^2(x)+sin(x)=1

trig

determine wheather each of the following is an identity or not prove it 1. cos^2a+sec^2a=2+sina 2. cot^2a+cosa=sin^2a

trig

Use the appropriate cofunction to find an equivalent expression for cos 54° cot 24 sec 32 sin 36 csc 44

ah trig help

use an apropriate sum or difference indentity to prove the double-angle identity cos2u=1-2sin2u

trig

Find the numerical value of cos(60degree) + cot(30degree): (A) 1/2 (B) 3p3/2 (C) 12 +p3 (D) 52p3 (E) None of the above.

Trig

How would you write the partial fraction decomposition of the rational expresion 1/(x^2)-25? I know that you factor the denominator, so that's 1/(x-5)(x+5). What are the next steps?

trig

how much force is necessary to stop a 2500 pound car from rolling down a 40degree slope

trig

An arc subtends an angle 15 degrees at the centre of the circle. If the radius is 4 centimetres, find the area of the sector?

Trig

Find the exact value of each of the following using reference angles. a)sin 225degrees b) cot 120degrees

trig

I have to factor the expression and use fundamental identities: sins^2xcscx^2-sin^2x sec^4x-tan^4x

trig

A rocket is launched at an angle of ascent (elevation) of 18 degrees. When it has traveled 6000 ft, what is its height above the ground?

math c30 trig

Determine the period length of y= 2/3 sin (3x/2 ) I had 3pi/2 but the correct answer is 4pi/3 how do you get that???

Trig

Find the measure of the central angle, in radians, given the area of the sector as 22.6 cm2 and a radius equal to 3.7 cm

Algebra/trig

How would i use my calculator to find the approximate value of the expression, cot 0.2748 rad

trig

find the coordinates of the terminal point on the unit circle determined by t=9pt/7 to two decimal places

trig

Use the Law of Sines to solve each triangle. P=110 degrees p=125, r=200 in triangel PQR

trig

Find the length of the circular arc intercepted by a central angle of 20 degrees in a circle or radius 5cm

trig

The hypotenuse of the right triangle PQR is 16ft. length. The sine of the angle <P is 3/5. How many feet long is the line if QR?

trig

Describe the possible values of variable a such that (/72) + (/a) can be simplified to a single term. Note: (/a) is the square root of a.

TRIG

find the degree measure of a central angle subtended by an arc of 8.00cm in a circle with circumference 20.0cm

Trig

Using this graph: imgur [dot] com/utSgKI9 Find the measures of angles A and G in the drawing (m is parallel to n) if C=4x-18 and F=2x+34

Trig

Use a half-angle identity to find the exact value for sec(x/2) if sinx = -12/13 ; 3pi/2 < x < 2pi

trig

Solve rounding to 2 decimal places. 9cosx + 4cos(2x) + 1 = 0 over 0° ≤ x < 360° Thanks to anyone that can help! I'm totally stumped.

math

In right triangle ABC, a = 52 ft and c = 63 ft. Which of the following trig ratios of angle B, would combine the given sides?

Trig

Evaluate tan(a-b). No decimals. Only exact answer. Sin a = -7/25, cot b = -8/15 neither a nor b are in quadrant IV.

Trig

Evaluate tan(a-b). No decimals. Only exact answer. Sin a = -7/25, cot b = -8/15 neither a nor b are in quadrant IV.

Pre-Calc/Trig

Use Descartes' rule of signs to describe the roots of the polynomial function. m(x)=x^3+3x^2-18x-40

TRIG!

true or false, the two sets of parametric equations x=t, y=t^2+1 and x=3t, y=9t^2+1 have the same graph. justify your decision.

trig

How much does it cost to paint a triangular surface of sides 6m,5m, and 11m at the rate of rs.20/-per metre square.

trig equations

Find all solutions (if they exist)for the given equation on the interval [0,2pi) cos^2x-5sinx+5=0

functions and trig

write the transformation of X cubed if it is shifted right four units and then reflected over the X axis

Trig

Find the exact value of the trigonometric function given that sin u=3/5 and cos v=-8/17. Both u and v are in quadrant II. Tan (u+v)

Trig

Convert the polar equation to rectangular form. r=4cos-4sin What I have so far: r^2=4rcos-4rsin x^2+y^2-4x+4y x^2-4x+y^2+4y=0

Algebra(please check my answers)

**Fill in the appropriate vocab words that best fit into the sentences below** ~" Word Bank "~ A) central angle B) line of symmetry C) reflection D) transformation E) vertical angles F) transversal G) point H) circle ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ GIVEN SENTENCES W/ ...

Algebra II

Solve x^2>_2x+24 x^2-2x-24>=0 (x-6)(x+4)>=0 So as long as x>6, it works. But what about two negatives? Try x=-5..checks...check me on that. So it looks as if -inf<x<=-4 works, and 6<=x<inf works. check that.

Math, Please Help! I don't understand!

Hi guys, please help me!1 I am having a tough time understanding this equation. Best answer goes to the person who shows there work. So... here is the equation... At the half time show, a marching band marched in formation. The lead drummer started at the point, (-2,-5) and ...

Physics

The two ropes shown in the bird's-eye view of (Figure 1) are used to drag a crate 3.7 m across the floor. How much work is done by the force fk→? How much work is done by the force T1→? How much work is done by the force T2→?

question about math (law of syllogism/detachment)

Does anyone know about the law of syllogism and law of detachment. If so, can you check my work.

MATH HELP

I posted this yesterday and no one bothered to check it, therefore Im posting it again, please check it this time. The south edmonton pet shop has several parrots and dogs for sale. There are a total of 24 heads and 82 legs in the display cages. A) Write a system of linear ...

chemistry(check my work)

If 6.01 g of K2SO3 dissolved in 930 mL of water reacts stoichiometrically according to the balanced equation in a reaction solution with a total volume of 990 mL, what is the molarity (M) of KCl produced? K2SO3(aq) + 2 HCl(aq) → SO2(g) + 2KCl(aq) + H2O(l) 6.01gx ...

English

Could you please check these few sentences, please? Thank you very much! 1) Can't you say "cheat in the maths test"or is only on possible? She invites me for a walk (is it a mistake? She invited me to go for a walk) 2) She makes a living by teaching. She was sorry (is it ...

Check my answers please

I posted this yesterday and someone said i did not haveoriginal data but it is in the link. Please take out spaces h t t p: //tinypic . co m/r/309lnac/3 1. The population growth exhibited by population A to the right is what? Is is exponential? 2. Population B reaches its ...

Physics-Please check?

Would changing the frequency of a wave cause a change in amplitude? I would say NO because they don't affect each other, correct? If I had a wave diagram will 4 complete waves showing and it said the diagram represented 4 sec in time the frequency would be 1cycle/ per second, ...

Math Check

Hi! Can someone check this for me? My teacher wants me to write the system of equations that will correspond to the final matrix. I have the matrix already, but I need help with the writing the system stuff. Thanks! Matrix: [-10 2 | 48] [-5 -6/4 |-9] My answer: 10x+2y=48 -5x+-...

Music

Need a word to fit the following definition. Patterns of beats by which music is measured. Rhythm? No. I'm doing a crossword puzzle and its _e_ _ rd Thank you for using the Jiskha Homework Help forum. Please check that spelling, because it looks like "metered."

Health

please check my answer thank you What is the first thing you should do if your bare hands accidentally comes in contact with a pt's blood. A report it to your doctor B wash your hands with and water C apply gloves D obtain a hep B shot I picked B

english check

A)all of the copies has been made b)none of the stores are on my way home. c)most of your friends is waiting for you inside. d)some of the promblems is for you to slove. im not really sure but it might be c.im not sure if wrong please correct.

english

I posted a question a few days ago, about Alan Kruger, and his stand on poverty and the financial crisis. I think Ms.Sue gave me a few links to check, but I can't find the post. Can someone link it to me please?

English

I still have a doubt, Could you check this sentence, please? 1) I think it would be best if our science department (head??) teacher would get in touch with you directly so that you can discuss every detail before drawing up the project.

English

Could you check these sentence, please? I don't know how to write n.2 1) 17 students from my I C look forward to corresponding with yours. On Monday I will let you know their class email adress so we can start the email partnership. 2) I measured (took is better?) my son the ...

Chemistry(Urgent, please check)

For C4H10O a constitutional isomer can be written as C-C-C-C-O-H with hydrogens also coming off of the 4 carbons. I know that this is an alcohol. I need to know if there are stereoisomers for this other than conformers. I think that there are stereoisomers because you can just...

Math - Algebra 2

I have tried several times to solve this. I have 3 points (0,-5), (3, -6), (-3,-7). I'm trying to get the quadratic equation. I keep getting y=(-1/6)x^2+ (1/6)x +0. When i plug in other numbers to check it's not the parabola facing down like my image. Please help!

please check(Social studies)

1.B 2.C 1.A pet dog that was forsaken would most likely look A. aggressive B. dirty C .well-trained 2.A meal that is skimpy will likely leave a person feeling A. too full B. satisfied C. still hungry

Social Studies

In return for offering the throne to William and Mary, it was demanded that all laws had to be approved by? A: Parliament B: King James C: The Catholic Church D: The Protestant Church My answer is A. Can someone please check if this is right?

english

30-day Money Back Guarantee Groom Co. electric shavers come with a 30-day money back guarantee. The only stipulation is that you use your new exclusively for 2 weeks to become accustomed with the product. If you are not satisfied, we will refund the amount on your receipt if ...

science grade 10 chemistry

do you know any website that helps explain how the naming of ionic compounds and etc work, and like naming acids. please help.

philosophy

I need an explanation for "A moral defect in a work of art is always also an artistic defect" and do you agree with that?IF yes or no,please illustrate why..!!

Chemistry

How many milliliters of a stock solution of 2.00 M KNO3 would you need to prepare 250 mL of 0.150 M KNO3? Please show work.

molecular bio

do pcr generated luxAB or gel purified luxAB work better in getting white colonies? WHy? please help. thanks

high school algerbra class

(2/x^2-4)+(3/x^2)+(x-6+1/x+3) someone please show me how to work this problem with the steps, so I can see if I can get it. This is due tomorrow in class. Thank you.

Physics

Work of 730 J is done by stirring an insulated beaker containing 80 g of water. What is the change in the temperature of the water? Please show calculation

precalculus

For the given functions f ,g , and h , find fogoh and state the exact domain of fogoh . Please show all of your work. f(x)=e^x g(x)=sqrt x h(x)=2x^2+3x-35

precal

For the given functions f, g, and h, find fogoh and state the exact domain of fogoh. Please show all of your work. f(x)=lnx g(x)=|x|-2 h(x)=4x-7

college algebra

graph the function using transformations, show and state , a) the domain, B) range c) the asymptotes F(x)= 1/x^2-4 please show work!

College algebra

graph the function using transformations, show and state , a) the domain, B) range c) the asymptotes F(x)= 1 ----- -4 x^2 please show work!

math

the function f is defined as the follows f(x)={x+6 if -5 less than or equal to x < 1 {9 if x = 1 {-x+5 if x > 1 a. find the domain of the function f is? b. locate any intercepts; if any please show work

Math

What is the probability of tossing two coins and having them both show heads? Show all work. Please help I don't understand this.

CALCULUS HELP

Find the derivative of the following function showing your work and fully simplifying your answer. STEP BY STEP PLEASE!!! f(x)=(8x-3)^5/(6x+7)^12 THANK YOU SO MUCH!!!

math

5. The sum of 7 unequal positive integers is 61. What is the largest possible value that any of those integers can have? A.55 B.40 C.39 D.13 E.9 please show work

Algebra 2

Find the indicated term of each expansion. fifth term of (x^2+squ. root 3x)^8 Please show work I need to learn how to do it.

math

Brown earns a dollar for every candy he sells. If he sells 30 candies, how much will he earn? Please show me the work.

math

The data in the table are linear. Use the table to find the slope. X| 2| 4| 6| 8 Y| 1|-2|-5|-8 A. 3/2 B. -3/2 C. -2/3 D. 2/3 Please help me work this out I don't know how to do this kind of stuff. Thank you in advance.

Math work please help

Which two square roots are used to estimate the square root of 42 25and36 36and49 49and64 25and64

Maths grade 8

Help how do I find "one exterior angle 180- interior angle" of 6,7, 9, 12 sides please show your work so I can understand thank you

Trigonometry

A tree is 5.8 metres tall and casts a shadow, the Suns elevation is 55 degrees, what length is the shadow? How do I work this out please?

Trigonometry

A tree is 5.8 metres tall and casts a shadow, the Suns elevation is 55 degrees, what length is the shadow? How do I work this out please?

Dr.Bob

A 100.0 mL sample of 0.05 M NH3 is titrated with 0.10 M HCl. Determine the pH of the solution after the addition of 50.0 mL HCl. Here is my work: NH3 + H3O+ --> NH4+ + H2O Before Addition: NH3= 0.005 mol H3O= 0 mol NH4+ = 0 mol Addition: NH3 = 0.005 mol H3O+ = 0.005 mol NH4...

Trig Help!

Question: Trying to find cos π/12, if cos π/6 = square root 3 over 2, how to find cos π/12 using DOUBLE angle formula? This is what I got so far.. cos 2(π/6) = cos (π/6 + π/6) = (cos π/6)(cos π/6) - (sin π/6)(sin π/6) = cos^2...

social studies please check!

1. Why did Harry Briggs and other parents sue the Summerton School District? A. They believed black schools weren't equal to white schools, so the schools should be integrated*** B. The state did not want to equalize the school work done by white and black schools C. They ...

Math

A $15 item on sale for $12 is marked down what percent? 100 * $12 = $1200 $1200/$15 = $6000 Did I do the correct work, or is it this: 100 * $3 = $300 $300/$15 = $4500 Is the first work correct or is the second work correct?

Calculus

Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. (Round your answer to three decimal places.) Between y = e^x and y = x for x in [1, 2]

Ed Tech @Ms.Sue

Check my answers please Ms.Sue 1.Which of the following is and example of print media? A. a blog B. a newspaper** C. a magazine's website D. all of the above 2.Which of the following is an example of public service announcement, or PSA? A. a commercial advertising an unscented...

accounting

On, April 1, 2015, Lester Company received a bank statement that showed a balance of $ 8,950. Lester showed a $8,000 checking account balance. The bank did not return check No. 115 for $750 or check No. 118 for $370.00. A $900.00 deposit made on March 31 was in transit. The ...

Jiskha

This isn't a question but I just want to thank everyone who helps others out on here. It's great that you don't answer some people if they don't give their answer. People are here for help, not to cheat. And you helpers actually help them work it out or you check their answer...

language arts (check answer)

please check this... which of the following shows a correctly punctuated compound sentence? A.As the miners,slept soundly,the thieves made off with all their supplies and gold. B.As the miners slept,soundly the thieves made off with all their supplies and gold. C.As the miners...

English

Could you please check these sentences, please? Thank you. 1) It is advisable for you to do the exercise. 2) It would be better/best if he did the exercise. (but NOT for him to do) 3) It is difficult for him to do the exercise. It is easy for him to do the exercise. 4)I'm ...

english garmmar

please help me if this correct answer or grmmar question below. what is your purpose to visit to canada and provide your itenerary. my answer. i am going to canada for work since i have an employer for 2 years contract working. 2.what other country you wish to visit and who is...

Physics

How much heat does a freezer need to remove from 1kg of water at 40°C to make ice at 0°C? (You will need to use the specific heat of water to drop the temperature first, before trying to make the phase change!) Show your work. Please help! Also, this site isn't about giving ...

Chemistry check and help

what is ... Sodium bisulphate hydroiodic acid ammonium dihydrogen phosphate Zn(HCrO4)2 Calcium metal ferrous bromide sodium carbide phosphate radical Check... sodium bicarbonate NaHCO3

chem/plz/check work studying for a final

what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 L*atm/mol*K)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L

chem/plz/check work studying for a final

what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 L*atm/mol*K)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L

English

Part 1: Poem Structure "Annbel lee" by edgar allen poe Check PLEASE?? In this part, you will analyze the structure of the poem. Please fill out the following. Title of Poem:Annabel lee Poet: Edgar allen poe Theme: potrait Type of Poem:Narrative poetry Style of Verse: free ...

English

CHECK PLEASE?! Part 1: Poem Structure "Annbel lee" by edgar allen poe In this part, you will analyze the structure of the poem. Please fill out the following. Title of Poem:Annabel lee Poet: Edgar allen poe Theme: potrait Type of Poem:Narrative poetry Style of Verse: free ...

Sciance/Math

How how can i turn this formula into a simple word problem... Percent efficiency(e)= Work out (J) _____________ x100 Work in (J)

adult education

I am doing a research for dissertation based on work life balance...can anyone help me ,work out on the title of poject,and where is the best place to search

College Algebra

How do you work out this problem? 3x3 + 2x2 + 3x+2 I showed three different people my work an they said I did it wrong I am so confuse.

MATH!!

(1)At the begining of her math class, Mrs. Reno gives a warm-up problem. She says, "I am thinking of a number such that 6 is less than the product of 7 and this number is 85." Which number is she thinking of? A-11 B-84 C-13 D-637 ___________________________________ (2)If x and...

chemistry

Predict the precipitate that forms: HCl + AgNO3 --> ??? i don't know what the answer is but i think it is Cing04 AgCl. You need to learn the solubility rules. If you don't have a web site I can give you one. hey watz up can you help me with a question please? If you have a ...

Physics check

A speeder traveling at 41 m/s passes a motorcycle policeman at rest at the side of the road. The policeman accelerates at 3.3 m/s2. To the nearest tenth of a second how long does it take the policeman to catch the speeder? Im sorry I am new to physics this is my first year and...

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