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trigonometry HARD!!

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Math (trigonometry)
Trigonometry identities are so hard... I need some help proving these identities: *Oh, and I'm only in grade 11, so the identities we use are quotient identity and Pythagorean identity. sinx/(sinx + cosx) = tanx/(1 + tanx) cos^2x - sin^2x = 2cos^2x - 1 Thanks! Lucy

Computer
Your computer is running very slow. The LED light for the hard drive blinks nearly continually, indicating that the hard drive is spinning even when data is not being saved or read from the hard drive. Based on this scenario, what is probably causing the slowness of the ...

TRIGONOMETRY
Because of the wind, a boat sails 4,728 meters in the direction S 47deg29mins W. How far south it goes? How far west has it gone? this is my report..please help me..i tried so hard but i really didn't get it..thanks!

English
My father was a hard working man but didn't earn much money. A. Correctly punctuated B. Add a comma after hard C. Close up hard working D. Add a hyphen after hard A

English
1. She was drying her hair with the hair drier. 2. Dry your body with this big towel. 3. After bath, you need to keep your body dry not to catch a cold. 4. Study hard, and you will get high scores. 5.Practice ping-pong hard, or you will lose the game. 6. Work hard, and you ...

Trigonometry One Quick Question! Please help!
Triangle ABC has side lengths 7, 24, and 25. Do the side lengths form a Pythagorean triple? Explain. Thank You so much! :) I'm having a hard time understanding this so it means alot!

English
I'll try to learn how to make a clear voice. I'll try to practice making a speech in my room. I'll try to study hard to go abroad. I'll try to study hard to learn in college in the USA. I'll try to study hard to learn linguistics in an American University. I'll try hard to be ...

plane and spherical trigonometry
trigonometry in oblique triangles

math trigonometry
My question is kinda hard i don't know how to start the problem to get my answer. the question is: You are cleaning the gutters on your house. the gutters are @ a height of 24 feet. if you have a 50 foot ladder, what is the minimum angle the ladder can form with the ground?

question about corrections(what they mean)
ok. so this may be hard to explain and may not be enough info that you understand but ill try. I did a paper and my teacher corrected it and said changes i need to make. here is a clip from the paper of something that she commented on: " Here are some examples. Hard Tack meant...

English
1. Don't take it too hard. 2. Don't take it so hard. 3. Don't take it too seriously. (Are they all the same? What other expressions can we use instead of #1? Is 'hard' an adverb or an adjective? What is the meaning of 'take' in the sentence?)

English
1. If I had studied hard, I could have gotten a higher score. 2. If I had studied hard, I could have gotten a better result. 3. If I had studied hard, I could have gotten a good/better grade. 4. If I had studied hard, I could not have gotten a lower score. 5. If I had studied ...

writing skills
You think using a dictionary is hard, _____________________________________ imagine ________ how difficult it was to compile the first dictionary of English. Which of the following is the best way to write the underlined portion of this sentence? If you think the original is ...

English
1. However hard you may study, you can not get a good point. 2. However hard you may study, you can not get a good grade. 3. However hard you may study, you can not get good points on the exams. 4. However hard you may study, you can not get good grades on the exams. 5. ...

Math Question
Jane has two tennis serves, a hard serve and a soft serve. Her hard serve is in (a good serve) 50% of the time, and her soft serve is in (good) 75% of the time. If her hard serve is in, she wins 75% of her points. If her soft serve is in, she wins 50% of her points. Since she ...

English
4. Read the following passage from “The People Could Fly”: The slaves labored in the fields from sunup to sundown. The owner of the slaves callin himself their Master. Say he was a hard lump of clay. A hard, glinty coal. A hard rock pile, wouldn’t be moved. What do these...

Math214
Jane has two tennis serves, a hard serve and a soft serve.Her hard serve is in (a good serve) 50% of the time, and her soft serve is in (good) 75% of the time. If her hard serve is in, she wins 75% of her points. If her soft serve is in, she wins 50% of her points. Since she ...

math
A computer store sold a total of 300 items last month. The store sold six times as many hard drives as they did CD-ROM drives, and half as many floppy drives as hard drives. Based on this information, how many of each item were sold? A. 30 hard drives, 90 floppy drives, and ...

Physics
A computer hard drive rotates at 5400 revolutions per minute. Starting from rest, what torque will get the hard drive up to that speed in just 150 revolutions? The moment of inertia of the hard drive is 1.3×10^-2 kg·m^2. I know the answer is 2.2 N.m, but I'm not sure ...

English
1. If you don't work hard, you will be poor. 2. If you don't work hard, you will become poor. 3. If you don't work hard, you will get poor. 4. Unless you work hard, you will be poor. (Which expressions are commonly used? Can we use all the expressions?)

trigonometry HARD!!
An airplane flies due north from a starting point at 234.6 mph for 40 minutes. Then turns flying 20 minutes at 252 mph in the direction N 20 degree 31 minutes East. How many miles is the airplane from the starting point?

Trigonometry
How to memorize the sum-to-product and product-to-sum formulae more easily ?? I know how to deduce the formula but when i try to memorize it, its so hard. Always sin, cos, a+b, a-b, i always get confused. Is there any way to memorize more efficiently??

English
1. You should study hard to get into university. 2. You should study hard to go into university. 3. You should study hard to go to university. 4. You should study hard to get to university. 5. You should study hard to enter university. (Are all the same in meaning? Which ones ...

MATHS 2
If x+y=45°, prove that {(cotx+1)(coty+1)}/{cotx×coty}=2 Please help me in this TRIGONOMETRY problem. From the topic - TRIGONOMETRY Ratios of compound angles

English
1. She studied hard, only to fail. 2. She studied hard, but failed. 3. She studied hard, but she failed. (Does #1 mean #2 and #3? Are they all grammatical? Do we have to put a comma before only?)

Trigonometry
An airplane is 48 miles due north of a town. An airport is 29 miles North-West of the town. It is determined that the airplane is 34 miles from the airport. On what bearing should the pilot fly to get to the airport? Please show work if possibly, I'm having a hard time drawing...

Grammar
Replace with or replace for? Sentence: I want to replace algebra (with/for) trigonometry. If I use the word with, then does that's an I want trigonometry and not algebra? If I use the word for, then does that mean I want algebra and not trigonometry? Any rules?

Chemistry
One of the main components of hard water is CaCO3. When hard water evaporates, some of the CaCO3 is left behind as a white mineral deposit. If hard water solution is saturated with calcium carbonate, what volume of the solution has to evaporate to deposite 1.00x10^2 mg of CaCO3

English. Adverbs
Underline the adverb in the sentence He worked hard and won the contest. Should both hard and won be underlined? Thank you

Language Arts
Which revision to sentence 3 contains an example of vivid description? 1) Tess turned and faced the podium. 2) She knew that once she walked up to the microphone, she would have to make a statement. 3) She thought a moment. A. She thought hard for a moment B. Tess closed her ...

spelling
Please could someone tell me to how to spell 'hard-waring', the dictionary doesn't list it. Is it hard wearing, hardwaring. Thanks in advance.

english
Which is correct? If you do it correctly, it is hard. OR If you do it right, it is hard.

spanish
is this translated right? In the morning I wake up at 8:30 a.m. The first thing I do is brush my teeth and comb my hair. Then I eat breakfast. By 9:00 a.m., I start my schooling (home). The first thing I work on is trigonometry. Then I do English, Trigonometry, American ...

Business Communication
1. Identify the sentence that contains the correct form ( the contraction or the possessive word). a. As the saying goes, "Its hard to say goodbye." b. As the saying goes, "It's hard to say goodbye." c. As the saying goes, "Its' hard to say goodbye." d. As the saying goes, "I'...

English hard crossward
ok my teacher gave us a crossword puzzle to do she said i was so hard that we can ask anyone for help and use the internet to look up the answers if you want to help please reply.

trigonometry
determine the trend of each linear function: 1. f(x)= 3x+5 I don't know what you call the "trend" or why you call this a trigonometry question. It is about algebra. The value of the function increases with x at a rate of three times the change in x.

Trigonometry
a 20ft. ladder is leaning against a wall so that the foot of the ladder is 9ft. from the buss of the wall what angle does the ladder make with the ground? what is the distance from the top of the ladder to the base of the house? based in trigonometry

education
sand, rocking chairs, animals, and strap swings are examoles of a__ environment. a) static b) soft c) creative d) hard. would the answer be d) hard

High School Courses
How often do state colleges which are moderately competitive require trigonometry? Is trigonometry something like algebra that they expect you to have, or do they usually not care as long as you have the right number of math courses? Would it look better for me to take ...

trigonometry
okay so i have this trigonometry problem were i HAVE to use logarithms. Now this is my work but can u help me solve it using logarithms. Find the area of the following triangles:(use logarithms) 1) c=426, A=45degrees 48' 36",and B=61degrees 2' 13"

Trigonometry
PLEASE HELP!! I really don't understand this...I just started learning about trigonometry and SOH CAH TOA and I think this probably has to do with that but I don't know how to apply it... Please explain this to me!!!! I need to know how to do it and not just the answer. ...

Ecosystems
how weathering releases phospahte from rock? i really don't know, any sites i could go on to to get the answer? no wikipedia, or hard ones. english aint my language so hard words i wont be able to understand.

Math
Sagal works as a DJ at a local radio station.On occasion, she chooses some of the songs she will play based on the phone-in requests received by the switchboard the previous day. Sagal's list of 200 possible selections includes a)100 songs in the top 100 b)134 hard-rock songs ...

Technology in the Classroom
There are several different hard drives available for a computer.Which of the following size hard drives is the largest?

Science
Well water in karst areas is often very hard. What is the role of chemical weathering in producing hard water in aquifers?

Science
Well water in karst areas is often very hard. What is the role of chemical weathering in producing hard water in aquifers?

hitting a hard floor
i weigh 200 drop to hard floor what the force of the falll I'm 5ft 1?

English
1. You have to study hard to get into university. 2. You have to study hard to go into university. 3. You have to study hard to enter university. 4. You have to study hard to enter the university. (Are the four sentences all grammatical and the same?)

computers ( basics)
the keys to my computer are hard 2 use have 2 press very hard 2 use also makes like a tapping noise any ideas thanks

SO HARD! MATH
How many nickels would it take to make a stack that's 100 , yes 100 , inches tall! How hard is this?!? AGHHHHHHHH Please help! \(X_X)/ HELPPPPPPPPPPPP MEEEEEEEEEE

Trigonometry
Solve for x to the nearest hundreth and can you explain how you get your answer I don't understand 3^x = 1.295 Your question has nothing to do with trigonometry. You can solve for x by taking the logarithm (to any base) of both sides of the equation. Then x log 3 = log 1.295 x...

Physics
Why should a tuning fork be set into oscillation by striking it with a soft rubber mallet rather than with a hard metal mallet? Striking it with a hard mallet excites higher order modes rather than mainly the fundamental. That is because a hard mallet impact causes steep ...

algebra 1 scale drawing
On a scale drawing of steps with the base being 1 3/4 inches and the steps going up 1/4 inch each on the drawing.Which scale was used for the drawing if the actual height of each step is 6 inches? A. 1/8 = 1 foot, 10 ines the are hard as heck 2 its hard and yet my teacher isn'...

Computer Hardware
Your computer fails to boot which has Vista as the operating system. You suspect that the problem is the hard drive, but you aren't sure. What can you do to prove that the problem is indeed the hard drive? A. Install XP on the hard drive and attempt to boot. B. Boot into Safe ...

Algebra 1
write an equation of the line containing the point and perpendicular to the given line (4,-8); 2x+5y=4 I am having a very hard time, but I'm trying hard to study the steps for solving the problem. Profoundly, thank you.

english double checking
The story of "The Turtle and the Rabbit Run a Race" teaches a few lessons. What lesson does it teach about cheating? "The Turtle and the Rabbit Run a Race" personally taught me if I don't work hard, and I cheat to earn the success I want; I will get the negative revenge of my ...

trigonometry
y=−34 sin(10θ+10π)−14 I need to graph this trigonometry problem. I need the parent graph, period, vertical shift, phase shift, a separate graph showing the new mid line with the amplitude and a final product graph. thanks for any help :)

Trigonometry
A balloon is flying west of two trigonometry students who are 7 miles apart. The angles of elevation of the two students to the balloon are 15 and 28 degrees. Approximate how high the balloon is flying.

Algebra
Suppose you but 5/8 of a hard of fabric for 2.50. What is the price of the fabric per hard?

MATH EMERGENCY!!
Please help. I know I asked this before, but the answer was lost during the upgrade. Show that 0.00317 is a rational number by writing it as a quotient of integers. (the 317 has a line over it.) please help. thats hard really hard im in grade 5!!!!

math
I must simplify this equation and am having a hard time (5+2a+3a)-(a2+a-6) I also would like to know if you could help me with this onex(4x2+3x-5)-2(4-x2) this is also simplifing. I have a really hard time with these, thank you

why dont u tell me
answer the question what is the hardest subject for why is it hard and give 1 of the hard things u have to do in that subject SIMPLE lol but watch it im not so old im still in school and im young DON'T even ask lol

Math
The converse of this: If you study hard, then your grades will be good. I think it should be : If your grades are good, then you studied hard. Is this correct?

communication
It’s hard to believe that a woman her age could accomplish so much. Inclusive Language—Making Language Nonracist and Nonagist. How can I do that. This is my one out of 10 it has me stump. woman, or person? Why not just drop the "her age" words? It's hard to believe a ...

logic
What would be the standard form of the following sentence? "The only road to success is hard work" First I had "All roads to success are hard work." Now I'm thinking that that's wrong because "roads" is plural and I'm talking about "THE road." So now I'm thinking: "All things ...

Statistics-Probability
An instructor will choose 3 problems from a set of 7 containing 3 hard and 4 easy problems. If the selection is made at random, what is the probability that only the hard problems are chosen?

Trigonometry
Alrighty I have to find two real world sinusoidal functions. I found: 1. A piston in an engine moves up and down in a cylinder. The height, h centimeters, of the piston a t seconds is given by the function: h= 120 sin(πt) + 200. 2. You can find the amplitude of a wave ...

Trigonometry
I really need help with this trigonometry question.please any help is appreciated. 1.I have to draw the graph of y=cos x from 0deg to 360deg. 2.Be sure to show a table of vales similar to the this table. colum X l colum :y=sinx 0 l 0.00 pi/10 l 0.31 pi/5 l 0.59 3pi/10 l 0.81 ...

English
How can you remember the noun, adjective, adverb, and changing adjectives and nouns into verbs suffixes and the anglo-saxon affixes?...i have the hard time memorizing them because it is hard to tell the difference...like adjectives and adverbs...do you have any tricks to ...

metrics
why is it so hard It isn't hard. It may be different and different things we deal with take some adjustments. Tell us what your problems are and perhaps we can tell you how we dealt with those problems the first time we encountered them.

English
How does Junsu look today? He looks tired. Do you know why? Yes, I do. 1. He studied hard for more than 3 hours. 2. He helped his mother clean the house on Sunday. 3. He went to a mountain and played with his friends all day long. 4. He rode a bike to Haeundae Beach and came ...

Maths trigonometry
using basic trigonometry derive the following equations, which are used to convert cartesian to polar coordinates and vice versa. why is the cos(phi)in the x term? x = R cos (phi) sin (lamda) y = R sin (phi) they are used in orthogonal projection of a spherical surface to a ...

hard math
please someone help me! i've tried so hard! factor m^6 + n^2 28x^2y^2 - 7x^4 8x^3y^3 +343z^3 thank you so much!!! For the second one: 28x^2y^2 - 7x^4 Factor out 7x^2: 7x^2(4y^2 - x^2) Now we try to factor 4y^2 - x^2, which is: (2y + x)(2y - x) We end up with this: 7x^2(2y + x...

English.
They drove a hard bargain. They pressured us to agree to the deal. They were fair in the end. We agreed to the deal. The four sentences are stated in chronological order, which is the best method for condensing the four sentences. A.we agreed to the deal because they drove a ...

Data Management
Jeffrey wants to start his second hour with a hard-rock song and finish with a pop classic. How many different playlists can Jeffrey prepare if he has chosen 4 hard rock songs, 5 soul pieces and 3 pop classics?

Music
Which energetic and emotional style of music developed in response to cool jazz and featured fats tempos, loud dynamics, and blues and gospel influences? bebop hard hop jazz fusion free jazz My answer: hard hop Which style of jazz music released performers from traditional ...

Intro to Psychiology 1
Basic arithmetic is not an easy task for Jeanne. In fact, she has to work hard at understanding mathematical concepts. She finds it hard to believe that basic math skills are: A) Present in all species B) A natural inclination, because they relate to language C) Present in all...

Chemistry 20
Sorry, the 1st part to those 2 questions are: Hard water contains metal ions, most commonly calcium and magnesium ions. Some moderately hard water is found to contain 200ppm of calcium hydrogen carbonate.

english
Does number one look good so far? Thanx 1. The story of "The Turtle and the Rabbit Run a Race" teaches a few lessons. What lesson does it teach about cheating? 1- The story of The Turtle and the Rabbit Run a Race teaches that even if you get what you want, and win you will ...

English
1. You have to study hard. 2. You don't have to study hard. 3. You have not to study hard. (Is #2 the same as #3?)

Chemistry
Points in favour: 1.Diffusion helps reduce the pollution of toxic gases. Points against: 1. old stains of ink, tea/coffee, cooked food are hard to remove through diffusion, or just hard to remove ... HELP PLS....V.V.IMPORTANT

Math-marine ecisytems
How do I divide 71%÷519million square kilometers and wat is the work? Need answers before 9:00pm today 8-30-16 thanks :) ;) so far I have done a dividing box with 510000000 in it and 71 as my divider my parents can't help it is to hard for them and it is hard cuz the book ...

business math
a computer store sold 300 items -store sold 6 times asa many hard drives as theyn did cd-rom drives and half as many floppy dtives as hard drives how many of each item

English
I worked hard with my mother in the fields. It was hard work, but I learned a lot about farming. ------------------- In the passage, what does 'it' refers to? What is the part of speech of 'a lot'? Does 'a lot' modify 'learned' or is 'a lot' the object of 'learned'?

Math
A computer store sold a total of 300 items in a month, and sold six times as many hard drives as they did CD-ROM drives, and half as many floppy drives as hard drives, how many of each item were sold?

[Physics] super hard/long circuit problem
I have this last one which is really long/hard. It's so long that I just decided to scan the whole problem. So here it is... and thanks everyone for the help so far! h t t p ://img201.imageshack.us/my.php?image=circuit5ij7.png *remember to delete spaces or it won't load!

Potato
Is peeling potato hard or cutting potato hard? I just wanted to tell you this is a homework help website and I noticed that some of your posts aren't exactly about homework. This is for homework help not chatting!And what exactly are you talking about is peeling or cutting ...

Resume
What is the different between posting a resume on line and hard copy An online resume is like a web page. It contains information about you, and other people can access it from a computer. A hard copy resume is a resume that is printed out on a piece of paper.

probability
A computer has 12 hard drives. The probability that an individual hard drive fails within one year is .25. What is the probability that the system will have exactly 4 failures in one year?

English
(1) We decided to climb Mt. Rainer, but it was a long, hard journey to Washington State from Medford, Oregon. (2) We were worried about our likely sucess in the cold enviroment of the upper slopes. (3) For one thing, Marty was broke and anxius about having warm clothes for ...

kind of etymology
ok so for my etymology class im doing a report and oral presentation on trade names and their etymologies. One of the first things i talk about are how companies or people choose a name for their product or compnay. one of the questions that most companies go by is is it ...

poetry
what is are good similies to add to life is like a box of chocolates? think in these terms: dark, light, sweet, bittersweet, creamy, hard, brittle, soft, warm, surprise inside, oddly shaped, second layer, intoxicating smell, hard to let go of, savory, don't want to finish the ...

math
if takes 6 minutes to hard-boil 3 goose eggs when dropped into boiling water, how long will it take to hard-boil 6 goose eggs? About the same amount of time. 18 minutes

Chemistry
I saw this sentence,"Most metals are strong and can be hit without breaking because they are HARD." But aren't pure metals soft and weak? Why do we still say they can be hit without breaking because they are hard?

english
Can someone please tell me how this paragraph would be rated? Literary technique paragraph using the second paragraph of the Jan 2011 regent. In passage 2, the author Marge Piercy uses similie to portray the hard work people he loves best do. Similes compare one item to ...

1st grade,Middle Sound
Hello there, My daughter going to first grade and i have very hard time to understand the middle sound on a word. I'm from Greece original so is hard for me This is the only thing she can not understand and i cant help her. Any Ideas how i can learn about it?

psychology
20 You are trying to boot your computer but your computer keeps displaying a message after the POST that says “'invalid specification”. What does the error mean?” a. an attempt to overclock the primary drive has failed. b. The hard drives thrashing from a ...

Chemistry 20
The mass of calcium hydrogen carbonate that would be found in 52.0L of hard water in a bathtub is _______________ g. The amount concentration of calcium hydrogen carbonate in the hard water is __________mmol/L

into to comp
Which of the following is a common standard interface for hard drives? (Points: 5) API EIDE SCSI USB is it D What is the interface between a hard disk and the CPU? (Points: 5) BIOS filter Controller Interface mechanism Small Computer Interface Is it Controller

choice
Explain how healthy behaviors and choices can positively effect your health status, and how unhealthy behaviors and choices will negatively affect your health status. Can someone please help me with this question, it doesn't seem hard but I am having a hard time figuring out ...

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