# Posts by tara

Total # Posts: 368

**Trig.**

Can you please review this to see if I did this right? 2cos^2x+3cosx=0 sq. root of (cos^2x)+(cosx)=sq. root of (-3/2) 2cos=(sq. root of -3 times sq. root of 2)/2)) times 2/1 cos=(2 times sq. root of -3 times sq. root of two)/2))

**Trig**

4tan^2u-1=tan^2u 3tan^2u=1 tan^2u=1/3 sq. root of (tan^2u)=sq. root of (1/3) tanu=sq. root of (3)/3 tanu=sq. root of 1 Did I do this one right? If not, could you please show me the correct method?? Thanks!

**Trig**

Solve: 3tan^2x-1=0. I got +/- (the sq. root of 3)/3 which is correct according to my study guide. However, I don't know how to use the unit circle to find this. The copy of the unit circle which I have does not have tangent values listed, only sine and cosine. I've ...

**Trig**

Simplify sin x cos^2x-sinx Here's my book's explanation which I don't totally follow sin x cos^2x-sinx=sinx(cos^2x-1) =-sinx(1-cos^2x) =-sinx(sin^2x) (Where does sine come from and what happend to cosine?) =-sin^3x

**Trig**

Is the right answer 1/sinB?

**Trig**

Use the fundamental identities to simplify the expression: cot beta sec beta I used 1+tan^2u=secu since cot is the inverse of tan. I flipped the tangent, then so it was 1+ (1/tan). But the book's answer is the cosecant of beta. Where did this come from??

**Trig**

I'm trying to find out which quadrant some trigonometric functions lie in. The problem is one of them is equal to zero, and zero is neither positive or negative. How do I determine which quadrant it belongs in then???

**social studies -psychology**

Which of the following characteristics will NOT reduce negative stereotyping in a contact situation? Intimacy Cooperation Equal status Independence

**4th grade**

write a number pattern for 8 starfish if each has 5 arms.

**math**

A community college has 3,000 students and 90 instructors. The college plans that enrollment will be 3,500 next year. How many new instructors should be hired if the college wants to keep the same student to instructor ratio?

**math**

57,59,70,55,70,60,56 find the mean

**PreCalc**

Chase Quinn wants to expand his cut-flower business. He has 12 additional acres on which he intends to plant lilies and gladioli. He can plant at most 7 acres of gladiolus bulbs and no more than 11 acres of lilies. In addition, the number of acres planted to gladioli G can be ...

**Math**

What is an approximation?

**operating system**

Which Web browser is natively available on a major operating system

**Physics - HELP**

225

**English**

I don't quite understand William Faulkner's Nobel Prize Acceptance Speech. I've looked it up in Google and can only find the actual speech, nothing about it.

**math**

Thanks so much!

**math**

A church congregation has 149 members, and each member donates 10% of their income to the church. If the church collected 335250 dollars last year from its members, what would be the mean contribution of its members? What about the mean income of its members? Please help, I&#...

**math**

Use the formula *C=5/9 (*F-32) to find the Celsius temperature (*C) when the Fahrenheit (*F) is 212 *F.

**Physics**

longitudinal waves ->move in the ____________as the medium movement. transverse waves-> move____________to the medium movement. Waves transfer_______ without transfering_____

**Civics**

What are the names of the cabinet posts?

**Precal**

I got this far, but now I'm stuck...please help 6cos^2theta - 5cos(theta) + 1 = 0 6cos^2theta - 5cos(theta) = -1 cos(theta) * {6cos(theta) - 5} = -1

**Business Law**

What are the components of common law?

**Business Law**

Why is it important to distinguish between the U.S. Constitution and statutory law?

**Science**

What is botox made from?

**Biology**

Why does smoking cause a rise in blood pressure?

**7th grade**

Mount Jamanota. It's elevation is 188 meters or 620 feet. It's visible from the entire island.

**Religion**

What song(s) could one play illustrating the Moral Development Theory by Lawrence Kohlberg?

**Religion**

What movie(s) could one show illustrating the Moral Development Theory by Lawrence Kohlberg?

**Civics**

How does our government's system of checks and balances affect the work of interest groups?

**english**

writing sentences and paragraphs

**writing sentences and paragraphs**

need help

**writing sentences and paragraphs**

you've applied for a specific job in your field of study .The human resources department arranges an interview and tells you to bring a polished piece of writing for them to evaluate your writing skills

**accounting**

ethicaL

**Anatomy and Physiology**

What is the structure of muscle that is a connective tissue surrounding a fascicle?

**Organic Chemistry - Refractive Index**

Hi, I have a question that I don't know if I am on the right track to answering. If two samples of organic liquids give the same refractive index reading, are the two liquids the same? I know the refractometer is a very precise instrument - up to 8 decimal places. It ...

**Computers or Business Tech**

Give four strong influences on changes in the workforce.

**chemistry**

yup he's right.

**Science**

In order to fall closer to the nucleus an electron must have ________

**Algebra**

A classmate said the answer is 10 silk neckties. I need help working through the whole problem.

**Algebra**

Claudio a banking vice president took 17 neckties to Milto Cleaners. The rate for non silk ties is $3.25 per tie and for silk ties is $3.60 per tie. His total bill was $58.75. How many silk ties did he have dry cleaned? Can you please show work on how to solve this?

**Math**

If a cat has 5 kittens, what is the probability that all 5 will be female?

**chemistry**

irvine! whaaaddup!

**Algebra**

Yes, thank you!

**Algebra**

What is the difference between domain and range? Describe a real life situation that could be modeled by a function? I think I understand domain and range. Domain is the x axis and range is the y axis correct? I need help with applying it to real life. Thank you.

**Physics**

What is the color of all the visible light frequencies mixed together equally? I would think white. Is that right?

**Physics**

Which of the following is the most energetic? Infrared Photon,Gamma Ray Photon, X-Ray Photon, or Visible Photon. Is it Visible Photon?

**Physics**

The energy of an X-ray photon is ..... the energy of a gamma ray photon. I think its the same as. Is that right?

**Physics**

The energy of a photon is directly proportional to its..... I think it may be frequency. Is that correct?

**DrBob222**

ok,sure will

**word unscramble in french**

ehscrpeamr

**college algebra**

but why cant there be a neg. on top? why do u move it to the bottom and make it positive?(note:neg6,5,2 and 4 are exponents) (4a-6b5)(7a2b4)= 28a-5b9 the final answer will be 28b9 over a5 my question was why do you move the "a" negative 5 to the bottom and make it a ...

**college algebra**

if you have a problem where you are multiplying numbers with exponents (both positive and negative) and your answer ends up with a negative exponent what is the reason you make a fraction out of it and put it on the bottom as a positive? why cant you have a negative exponent ...

**physics**

A 5 kg book sliding on the floor with initial speed 20 m/s comes to rest in 100 m. What is the magnitude of the frictional force acting on the book? The answer is 10 N, but how do you arrive at this answer?

**Calculus**

what is the definite integral of 1) Upper boundry 4 Lower boundry 0 Problem: x/ square root of 1+2x) dx 2) Upper boundry 1/2 Lower boundry 0 Problem: sin^-1x / square root of 1-x^2) dx 3) upper boundry 4 lower boundry 1 Problem: e^square root of x/ square root of x) dx 4) ...

**math - 8**

Please help me with solving equations with rational numbers. i have struggled in math all my life. I desperately need help with my homework. Thank you

**economics**

A firm uses capital to produce revenue. The marginal revenue from the first 5 units of capital is as follows: 1st unit has MR 2.1, 2nd unit has MR 1.93, 3rd unit has MR 1.76, 4th unit has MR 1.55, and 5th unit has MR 1.35. If the interest rate is 51%, what is the optimal ...

**english 11**

I need help finding out if i underlined the correct words that are nouns. If you wouldnt mind helping could you tell me what words are nouns so i know if i did it right? 1)The time was running out on the contest. 2)Even when she took the cold medicince, Sara wasn't able to...

**social studies**

I need information on the process charles kettering went through to invent the electric cash register or the car self starter and did he have problems inventing them. I can only find out that he did invent them. Here are some sites that will help you. http://en.wikipedia.org/...

**Math**

After doing an experiment you learn that 70 percent of the carrot seeds from Company A germinated within 10 days, while only 50 percent of the seeds from company B germinated within 10 days. What was the comparative germination ratio? looks like a simple 7:5 ratio to me That&#...

**socal**

if i have to do reserch about french guiana and i cant find information on the internet or books. what should i do Thank you for using the Jiskha Homework Help Board. Not to worry on French Guiana! I have more if you need it, but here's a start for you: http://en.wikipedia...

**math check please**

1.Write 4x4x4x4x4 as a power of 4. Answer: 4^5 2. Evaluate. 72 divide 8-9 divide 3 Answer: 0 3. Give the place value for the indicated digit 8 in the number 138,350 Answer: Thousands 4. Fencing a rectangular field that measures 37 ft by 27 ft How much fence should i buy? ...

**math help please**

I am having a hard time understanding recprocial with fractions I would like to find a web site to help me understand this better I have a problem that is need to know if i have done it right the question is find the reciprocial of (-1/7)(14/3)(9) This how I done the problem ...

**math check**

1.A caterer made 150 sandwiches for 120 people. How many sandwiches are there for each person? A 1.25 or 1 1/4 sandwich/person 2.On the blueprint of Lauren's new office building, the scale is 3 in. equals 8 ft. What will be the actual length of Lauren's office if it ...

**math check**

Would some please check these and see if I am doing them right thank you 1. Gasoline is about $2 per gallon. You use about 1 1/2 gallons each day driving to and from work. How much should you budget for gasoline over the next month (about 20 workdays)? Answer 1 1/2 x $2.00 = $...

**math check**

Would some please check these and see if I am doing them right thank you 1. Gasoline is about $2 per gallon. You use about 1 1/2 gallons each day driving to and from work. How much should you budget for gasoline over the next month (about 20 workdays)? Answer 1 1/2 x $2.00 = $...

**math**

Julio works as a quality control expert in a beverage factory. The assembly line that he monitors produces about 20,000 bottles in a 24-hour period. Julio samples about 120 bottles an hour and rejects the line ifhe finds more than 1/50 of the sample to be defective. About how ...

**orientalism of muslim and arab american**

I am also a student at UOP and I will say that this is not the first class I have had problems with questions that they don't provide the answer to in any of the readings. I have a 4.0 and I am still having problems with this question!