Trig check my work please?
90,377 results, page 8

trig
prove the trig identity cos(4x) = 2sec^2(2x)/sec^2(2x) 
Trig Identities
Please help...I'm not understanding trig identities and how to manipulate and express these two problems in their associated functions. Thanks a)Express as a function of cos (theta) 2 sin^2(theta)  1 b)Express as a function of sin (theta) or cos (theta) tan^2(theta)  2 sec(... 
Trigcheck answer
Solve the equation of the interval (0, 2pi) cosx=sinx I squared both sides to get :cos²x=sin²x Then using tri indentites I came up with cos²x=1cos²x Ended up with 2cos²x=1 Would the answer be cos²x=1/2??? 
Math (Check 2 answers please)
1. What is the value of b in the equation b + 8 = 13? A. 5**** B. 8 C. 13 D. 21 2. The steps below show the incomplete solution to find the value of x for the equation 7x − 3x − 4 = −1 + 21: Step 1: 7x − 3x − 4 = −1 + 21 Step 2: 7x − 3x − 4 = 20 Step 3: 4x − ... 
Language Arts
1)In all together now, Barbara Jordan's main purpose is to a)persuade readers that a tolerant society is best created by working on a small scale.*** b)inform readers of the civil rights movement in the United States. c)praise the work of the leaders of the civil rights ... 
7th grade Math
Mrs.Jackson earned a $500 bonus for signing a oneyear contract to work as a nurse. Her salary is $22 per hour. If her first week's check including the bonus is 1,204, how many hours did mrs.jackson work 
math/algebra
can someone check my work? x^2 = 22 xãx22 if x^2 is 22, then x is + sqrt 22 
Check Work (Math)
1) Find the difference 3(47) my answear 6 
Com
Does anyone on here use Writepoint to check your work?? 
Compound Inequalities
Solve. 5 < x  2 < 11 a. 5 < x < 11 b. 7 < x < 13 c. 7 < x < 11 d. 5 < x < 16 My answer is b. Can you check my work? 
Math
Hello, I need a little assistance with showing my work on this question. The equation is 4 7/8 x 2/3. I have to explain how this person is wrong then show the work the correct way. Okay so the person's work is written as, "4 7/8 x 2/3 = 4 14/24 = 4 7/12" So, I have to ... 
English (please check my work !)
Mr. Williams is the teacher (who, whom) went to such great trouble to help the students. *who 2. Would Agnes like to swim at Holden Pond with Ellie and (I, Me)? *I 3. What do you think about (his, him) being chosen as class president? *him 4. Introduce the guests with (whom/... 
HURRY CHECK THIS MATH
A costume designer made 10 costumes that each used 5.8 yards of fabric. If she had 238.2 yards of fabric to start with, about how much fabric does the costume designer have left? Write an equation and estimate the amount of fabric left. A customer went to a garden shop and ... 
Algebra
I need to find the volume of a cylinder. Use 3.14 for pi...I think the answer is 24,501.42 m^2...the picture shown is a cylinder with a diameter of 34m and a heigth of 27m I know how to work these problems out and I got 24,501.42m^2 but the computer is giving me an answer of ... 
please check my answer
Please check my answer thanks :) What is the simple interest on $14,500 loan at 9% interest for 5 years Interest = $14,500 x 0.9% = 1305 x 5 = 6525 
precalculus
I'm going to do this on my own, but I would like to check mine against yours  give me today to work on it and I will be able to compare. List all possible rational zeros for the polynomial find all real zeros and factor completely. show work f(x)=3x^429x^3+89x^275x36 thank... 
@Help plzz check asap
I've removed the entire test you posted  without indicating your answers! Please post only those questions you have serious doubts about along with what YOU THINK the answer is for each. Then when someone comes online who has read that work, he/she may be able to help. Do ... 
please check over my work
A 2.5 kg stone is released from rest and falls toward earth. After 4s, the magnitude of its momentum is: My work: J=F*t =(F *t)= 24.5N * 4s F= 2.5 *9.81= 24.5 J=P P= 98kg m/s A sphere X, of mass 2kg, is moving to the right at 10m/s. Sphere Y, of mass 4 kg is moving to the left... 
English
Can some one please check my work? Thanks! From the words below supply the words needed to complete the sentences. occult; serene; partisans; fervor; fledgling; blasphemous 1. Even though he was a FLEDGLING writer, his work suggested he was a professional. Once in a FERVOR, he... 
algerbra
am i correct on this? question: solve and check square of 5x+6 is equal to x work and answer: square each side 5x+6=x^2 subtract 5x6 on both sides 0=x^25x6 (x+1)(x6) x+1=0 subtract 1 on each side x= 1 is a reject x6=0 add 6 on each side x=6 and 6 was my answer and the ... 
PreCal
[Note: I'm still having issues with identities with regard to trig] Verify the Trig. identities: (a). cot(x+y)=(cotxcoty1)/(cotx+coty) (b). sin0(cot0+tan0)=sec0 [Note: 0=theta symbol] 
Geometry
The midpoint of Line Segment AB is (2,9). The coordinates of one endpoint are A(4,10). Find the coordinates of endpoint B. Can someone please check my work and tell me if my answer is correct. Step 1: 2x9= 4x+10 2x9= 10 2x= 1 Step 2: AB= 2x9 =2(1)9 =18... 
Physics
A heater cansupply 98000J an hour. If a lot of ice is already at 0 degrees, how much ice can be turned to water? check my work please: Q/l=m 98000J/kg / 3.35 * 10^5J = 029kg of ice can be turned to water 
biology /check please
1What phase are daughter cells in as a result of mitosis? Anaphase 2 During what phase of mitosis do centromeres divide and the chromosonemes move toward their respective poles? prophase 3 Wchich phase of mitosis is the last phase that chromatids are together? anaphase ... 
Trig
How do I simplify this? cos4xcos3xsin4xcos3x I pulled the cos3x out as a common factor but that doesn't really help. Can someone please direct me on this. Thanks! 
trig
Given that sin x =  ã2/2 and that cos x is negative, find the other functions of x and the value of x. can you explain how this problem can be solved please. 
trig
how do you graph y=(1/4)sin(3/4x+pi/8? include the amplitude, period, vertical translation, horizontal shift, and table of values please. 
Pretrig/Calc
Please help me. Use Descartes' rule of signs to describe the roots for each polynomial function. 3. m(x)=x^3+3x^218x40 
trig, precalc, math, algebra, trigonometry
Rewrite: tan(cos^−1 (v)) as an algebraic expression in v. Please help me understand. 
math
jen can run at 7.5 m/s and mary at 8.0 m/s. on a race track jen is given a 25 m head start, and the race eds in a tie. how long is the track? let x = distance run by jen. x + 25 = distance run by mary. time jen = d/r = x/7.5 time mary = d/r = (x+25)/8 Since they arrived at the... 
Algebra 2 (check)
I have some problems that I've answered and I need someone to check to see if I'm right. Im just posting the questons and my answer,if its wrong I'll post my work,so here it is bear with me please and thank you. 1)name which sets of numbers to which 28 belongs. my answer = ... 
English
Could you please check these three sentences, please? 1) Describe the kind of technique adopted by 20century writers to represent the unspoken activity of the mind. Provide an example of its use from the readings done in class. 2) I had to authenticate all the students' tests... 
History
Hello, How are you today? Please Help. I'm the parent & my daughter wants me to check her homework but, the sad thing is I don't know about this. In your own words, please! Please no link! I'm begging you! What were the positions of the Federalists & Antifederalists on the new... 
Math please check answer
please check my answer thanks :) A Pet supply store recorded net sales of $423,400 for the year. The store's beginning inventory at retail was $105,850 and it's ending inventory at retial was $127,020. What would be the inventory turnover at retail, rounded to the nearset ... 
Calculus Please check
Please check my answers and let me know if I did something wrong. Thank you! Find the partial derivative of x, and the partial derivative of y, then the partial derivative of x (1,1), and the partal derivative of y (1,1). f(x,y) = x^4 y^2 x here is what I got @f/@x = 3x^3 y... 
Chemistry  please help
Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 > 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS / 0.266 mol = 7mol O2/ ... 
Chemistry  please help
Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 > 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS / 0.266 mol = 7mol O2/ ... 
@ABC
Stop posting more questions until you have gone back and followed the directions on the Post a New Question page: Please show your work. Tutors will not do your homework for you. Please show your work for any question that you are posting. 
L.A.Check Answer
According to "Life Without Gravity" why can astronauts' muscles become weak? a. Without gravity, the blood is rerouted from the legs to the head. b. Without gravity, the body "grows" as much as several inches. c. Without gravity, eating is difficult, so the body does not get ... 
AlgebraPlease check my answers
Posted by Jessie on Monday, October 18, 2010 at 3:48pm. I think I figured it outplease check I'm really stuck on these problems Simplify 6xy(3xy)^2? I think this is 2/3xy choices were 2/xy 3xy 2xy 2/3xy Simplify 12xyz^2/8x^2z choices were 3x^2y/2z^3 3x^3y/z^3 3x^3y/2z^3 x... 
AlgebraPlease check my answers
Posted by Jessie on Monday, October 18, 2010 at 3:48pm. I think I figured it outplease check I'm really stuck on these problems Simplify 6xy(3xy)^2? I think this is 2/3xy choices were 2/xy 3xy 2xy 2/3xy Simplify 12xyz^2/8x^2z choices were 3x^2y/2z^3 3x^3y/z^3 3x^3y/2z^3 x... 
Social Studies
2. How did World War 2 affect life in Georgia? (Choose all that apply.) A. More Georgians were out of work than ever before B. Many pepole moved to the North or West C. Pepole made sacrifices for the war effort. D. African american Georgians moved to the North looking for work... 
Teaching dogs tricks
Please check my answer thanks Owners who aren't interested in professional work but want to show off their dog's tricks to an appreciative audience might want to get involved in A. teaching obedience classes. B. pet therapy. C. teaching tricks classes. D. agility. I say B 
Physic II
How much work is done by 3 moles of gas when they triple their volume at a constant temperature of 400 K ? show work please 
math
my 7 year old is having problems doing his work. can you please give me some work sheets for him that are fun and educational. 
calculus
Iamhaving a really hard time trying to understand this question. Can someone please show me how to work this question. Give the following polynomial, find a. the zeros and the multiplicity of each b. where the graph crosses or touches the xaxis c. number of turning points d. ... 
calculuscan someone please help me with this ques
I have two questions if someone can PLEASE help. 1.solve the equation in the real number system. x^4+11x^3+24x^223x+35=0 **Please show work** 2.Use the remainder theorem to find the remainder. When f(x)is divided by x3. Then use the factor theorem to determine whether x3 is... 
TRIGONOMETRY
Can someone please show me step by step how to calculate the modulus and the argument for these complex numbers? I have a trig final next week and I am trying to finish this study guide so I am prepared. Thank you so much! If you can, please show my how you get the answer so I... 
English
A nurse attended (a)...... her work place in time.(b)....... all her sincerity she was attending (c)....... the patient but she knew that her effort (d)........ keeping the patient alive might end (e)........ smoke.The doctors of board were shocked (f)...... the pitiable ... 
Business Finance
Please help!!!!!!!!!!! On November 1, 2009, Broom Company received a bank statement that showed a $2950 balance. Broom showed a $4010 checking account balance. The bank didn't return check No. 124 for $1080 and check No. 138 for $720. A $3200 deposit made on October 30 was in ... 
Chemistry I
For the methanol combustion reaction 2CH3OH(â„“) + 3O2(g) > 2CO2(g) + 4H2O(g) estimate the amount of P [change]V work done and tell whether the work was done on or by the system. Assume a temperature of 27â—¦C. 1. 2.5 kJ, work done by the system 2. 2.5 kJ, work... 
French #2
Can someone please check my work? Last Saturday different people did different things. Explain what each one did by completing the sentences with the appropriate "passé composé" forms of the verbs in the list. Be logical. acheter assister ranger laver nettoyer rencontrer ... 
Spanish
Can someone please check my work? I was in Grade One. We went to the pumpkin patch. I got a really big pumpkin. I tripped while carrying it. I bit into the pumpkin. And lost one of my front teeth. Fui en primer curso. Fuimos al terreno de calabaza. Obtuve un muy grande ... 
math
can someone check my work? divid t^11/ t^3 is the answer t^3r2 
algebra (check work)
evaluate the expression when a = , b = 3, c = 12 a + b + c = 22 is 22 the correct answer? 
Physics
Please help me with my physics homework I've been given a week and can't for the life of me work out how it is done. Tom has a rubber ball which weighs 5 kilograms and bounces 3.8 meters from a drop height of 4 meters using this information please work out the mass of the Sun. 
math
Ex 3: 4x7<2x+5 4x72x<2x2x+5 2x7<5 2x7+7<5+7 2x<12 2x/2<12/2 x< 6 Note I did not switch the order of the inequality here since I divided by a positive number. Multiplying or dividing by a positive number does not change the order of the inequality. So... 
Maths  check please
Fig.1. Shows a signwave on the its horizontal axis "Time in (ms)" means that time is measured in milliseconds. The time taken is 20 ms in total Question asks for frequency of the sinewave ? Cant really draw Fig.. here :0( But the period is 5 milliseconds, the wave is repeated... 
trig
To determine the distance to an oil platform in the Pacific Ocean, from both ends of a beach, a surveyor measures the angle to the platform from each end of the beach. The angle made with the shoreline from one end of the beach is 83 degrees, from the other end 78.6 degrees. ... 
Grammar ***CHECK MY WORK PLEASE***
What are the three main parts of a research report? a) Title, body, conclusion ********* b) Introduction, body, sources c) Introduction, body, conclusion d) Introduction, evidence, conclusion 
Chemistry
Please check my work what is the molarity of a solution that has 34.85 g of Potassium sulfate dissolved in one liter of solution? so K2(SO4) molar mass is 174.26, 34.85 grams x 1mol/174.26 than divided by 1 Liter equals .19998 Molarity with sig figs would it be .1999 or .2000? 
PreCal (Help Please!!!!)
[Note: i need help really badly. I only have 2 hours left] Find all solutions of the following equations. Be sure to check for extraneous solutions. show work 1). 3cosθtan^(2)θcosθ=0 2). tan (3θ)+1=0 
psychology
In class we were asked to provide an one example of classical and operant conditioning. We have to identify the stimulus, response and reinforcers in each example. here are my examples: Clasical Conditioning My cat comes running everytime she hears the can opener. Operant ... 
English
Can you please check these few sentences, please? Thank you. 1) I just wanted to know why two meals are not included in your rate and how much your hotel charges for a dinner. 2) Would you please be so kind and send me the details of your offer again? 
Trig
A ramp 38' long rises to a platform. The bottom of the platform is 20' from the foot of the ramp. Find x , the angle of elevation of the ramp. Round your answer to the nearest hundredth of a degree. After this question I'm done with TRIG!!! Thanks 
Calculus  please check my work
differentiate each function a) y = cos^3x b) y = sin(x^3) c) y = sin^2 xcos3x my answers: a) y' = 3cos^2 x(sinx) b) y' = cos(x^3)(3x^2) c) for this one, i don't know which one is correct. i got 2 different answers but i think they may be the same.. im not sure, i did it twice... 
English
1. Can you give me a rain check? 2. Can I take a rain check? 3. Can I have a frain check? 4. Can I get a rain check? (Are they all grammatical and the same? Which expression is commonly used?) 
Physics
What visible wavelengths will eject electrons from a a metal with a work function of 2.6 eV? Please show all work I am a little confused :) 
mat115
Please help me with this math question please. Am I correct in my computing? 116 5 ____ = _____ = undefined 77 0 If I am wrong please help and can you show the work? Thank you. 
Physicscheck
can you check my answers? 2.is more work required to bring a fully loaded truck up to a given speed, than the same truck lightly loaded? defend your answer? more work is required to bring a fully loaded truck up to a given speed because it is doing more work since it is fully... 
To Ms.Sue or any Math helpers
Can you please help me with my math law of exponent quesions, please check my answers, please its due very soon. 
Math check please
A spring has stiffness of 100Nmm, the initial compression of the spring is 15mm, and it is then compressed to 65mm. a)Find potential energy at 15mm: K=100Nmm*1000=100000Nm Ep=Kc^2/2 Ep=(100000*0.015^2)/2 Ep=11.25 joule (ans.) b)Find Ep at 65mm: Ep2=(100000*0.065^2)/2 Ep2=211.... 
Physics please check
Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final T initial) (2531J  1101J) = 3/2(3.0mol)(8.31)(T final  345K) ... 
science
Describe one way in which work is done (Reminder: For work to be done, the force and the distance must be in the same direction.). guitar, keyboard Can you give me an example of how to describe how work is done in one of these example please? 
science
Describe one way in which work is done (Reminder: For work to be done, the force and the distance must be in the same direction.). guitar, keyboard Can you give me an example of how to describe how work is done in one of these example please? 
English
Can someone please check my answers? Which of the following settings are evident in Unit 4's stories of Twain, Jewett, and Chesnutt? Check all that apply. American West* posCivil War South* New England* Gold Coast 
precalc/trig help please
The area of a circle is 18pi square meters. What is the radius (leaving answer in simplest radical form) 
Trig
If tan A= 3/4 and cos B=5/13, where A and B are both thirdquadrant angles, find sin(A+B). Please explain how you found all the answers 
chemistry
i have to write chemical formulas and balance them: nitrogen and oxyen> nitrogen monoxide N2+02>2NO nitrogen monoxide and oxygen> nitrogen dioxide gas. NO2+O>NO2 (i'm not sure about this, please check) nitrogen dioxide and water> nitrous and ... 
Math check my answer
What music plan is a better deal? site A: $29 per month plus .80 cents per download site B: $17 per month plus $1.19 per download write an equation and show how many downloads make site A a better deal. My answer:: .80x + 29 > 1.19x + 17 after all my other work i got x>... 
Physics please check repost
Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final T initial) (2531J  1101J) = 3/2(3.0mol)(8.31)(T final  345K) ... 
math complicted question please help
ok umm it takes pam 45 mitues to drive to work and 60 minutes to drive home from work.write the ratio of he time pam spends driving home from work to the time she spends driving to work in tree differnt ways.(30 points) 
language could you please check my work
true(t) or false (f) 1)f reading is not a real hobby 2)f an activity that is done outdoors is not a hobby 3)t photography is a popular hobby 4)t building a cabnint can be part of a hobby 5)f cooking is never considered recreation 6)t model building is very educational 7)f ... 
English
When is greatness is a bad thing. Please don't say when it is misused. I need a good answers please. Thanks in advamce. I don't understand your first sentence. Please clarify and repost. Please note that we don't do students' homework for them. Once you have come up with a ... 
Math
Check my answers please. 1)Which statement is an example of the Identity Property of Multiplication? a)8 • 0 = 0 b)8 • 1 = 8<<<< c)8 • –1 = –8 d)–8 • –1 = 8 2)Whats another way to write 3*(4+7)? a)3*4+7<<<<< b)3*4*7 c)3*4+4*7 d)3... 
English
Revise the following sentence to omit personal pronouns. I think it is important for you to evaluate information before it in a paper. It's important to evaluate information before including in your paper. Please check my work. 
chemistry: please check work
How many grams of solute are contained in 64.3 mL of 0.0238M KOH? Do I convert 64.3ml to L=.0643L Multiiply .0643L and .0238M KOH=.00153 Multiply .00153 and 56.105 g/mol KOH=.0858g KOH 
Physics Derivation URGENT!!
Can someone please show me how to derive this...I am going crazy I have tried everyhthing that I can think of with this equation..even the Range Equation and that doesnt work! So please! I am dying and aahaha! How does this work in terms of mass and L? I think L has to be ... 
math (correct my work to see if it's right please?
Could someone please look over my work and correct it A person made semiannual deposits of $490 into an account that pays 5.1% a interest compounded biweekly, for 6 years. Determine the future value of the investment. N= 6*2= 12 I= 5.1 PV= 0 PMT= 490 (FV) = 6964.393519 P/Y... 
physic please check answers test tommoro
5) suppose in the previous question when timmy is sitting at rest he has 40j of GPE then his dad geves timmy a push when his dad lets go Timmy has 60j of GPE and 12J of KE a) befor his dad pushed him GPE= 40J Ke= 0J TE=40J b) immedialtey after his dad pushes him GPE= 60 KE= ... 
English
I have some more sentences to check on the same subject.Thank you very much! 1) I took off a day because I was ill. Correction: I took a day off... Or I went sick (I took a day sick leave/I asked for a day sick leave??) 2) I would like to work at my passion because I would be ... 
Please Check My Math Work
(3sqrt5)(2sqrt10) I got:6sqrt50 Is this correct.? You can take this one step further. 6√50 can be simplified to this: 6√(25 * 2) >you can take the square root of 25. 6 * 5 √2 = 30√2 >this is the simplified form. thanks can you help me with my ... 
English
Using Debating rules how would you define the term 'at work' as used in this sentance "If you need me I will be at work. Call me" Please help Thanks Minnie 
language please check my work
revise the sentence for a clear meaning here is the sentence Surgeons moved around the operating room, skillfully using tools wearing slippers. the revised sentence Surgeons,wearing slippers,moved around the operating room skillfully using their tools. please if there is a ... 
Math  Please Check My Answer
Please help me with the following: Find the greatest possible error for each measurement. 4 1/2 oz A. 1/4 oz B. 2 1/2 oz C. 1 oz D. 2 1/4 oz I know it is not B(I got it wrong.), but I think it is A. Is this correct? Please help me by checking my answer. Any help is appreciated... 
Math
Find an equation for the tangent to the curve y=1+ (sqrt2)(csc(X)) + cot(X). I just learned, though my teacher wasn't super good with explaining, derivatives for trig functions but they still aren't making too much sense. Could you please give me a step by step solution for ... 
IT
Can someone check this for me please.. 18 MB of data are to be transmitted over a a megabyte per second connection. How long should the complete transaction take, to the nearest 0.1s. Size of file / data rate so, 18,874,368 bytes / 4,000,000 = 4.718592 = 4.7 is that correct a ... 
math
Can someone please check my work? Solve using substitution method 1. 3x+2y=12 x=526y answer:40.8 I am pretty sure that one is wrong. Solve using elimination method 2. 2r7s=31 7r+2s=24 answer: (230/53,468/53) 3.3x+4y=3 6x+8y=6 answer: No answer. problems eliminate eachother 
business
. You've written a check to Goodwill Supply, and the check has been lost. What should you do? A. Stop payment on the first check; then write a second one. B. Send a counter check to Goodwill. C. Write another check immediately. D. Call Goodwill and tell them you'll write ... 
Health care please check answer
Please check my answer thanks you for your help :) You are a Health information mangement professional and you are doing Medicare coding to help you assign reimbursement classifications to episodes of care you would use a fee schedule. True or False I said false I think that ...