Sunday

April 20, 2014

April 20, 2014

Number of results: 55,762

**Precalc/Trig Word Problem**

Greg ! Enough of "homework - dumping" Show some work before any more help is given.
*Monday, October 8, 2012 at 9:12am by Reiny*

**Precalc/Trig Word Problem**

From the top of a 200-ft lighthouse, the angle of depression to a ship in the ocean is 23 degrees. How far is the ship from the base of the lighthouse?
*Monday, October 8, 2012 at 9:12am by Greg*

**trig/PreCalc**

You must have copied the problem wrong, y = -7 +4 = -3 It never equals zero.
*Tuesday, March 23, 2010 at 12:32am by drwls*

**Trig/Precalc**

solve 6=e^0.2t Round your answer to the nearest hundredth Someone please help me - I don't understand this problem at all!
*Thursday, April 19, 2012 at 12:55pm by tabby*

**college trig word problem**

ty
*Saturday, December 15, 2012 at 2:16am by Joel*

**Trig/PreCalc**

Thanks!
*Monday, December 29, 2008 at 8:01pm by Tim*

**precalc/trig**

5/(x+2) - (x-3)/(x^2-4x+5) or, 5/(x+2) - [(x-2)-1]/[(x-2)^2 + 1]
*Saturday, December 3, 2011 at 11:19am by Steve*

**Trig word problem**

since you know the height of the shadow and an angle, you can use a trig function to find the height of the flagpole, assuming that the triangle formed is a right triangle, unless you know the Law of Sines and the Law of Cosines.
*Sunday, February 24, 2008 at 9:42pm by Laxmi*

**Trig word problem**

since you know the height of the shadow and an angle, you can use a trig function to find the height of the flagpole, assuming that the triangle formed is a right triangle, unless you know the Law of Sines and the Law of Cosines.
*Sunday, February 24, 2008 at 9:42pm by Laxmi*

**precalc/trig - PS**

That would be in m, not m^2 :-(
*Tuesday, February 21, 2012 at 8:48am by Steve*

**Precalc and trig**

thanks! i accidentally posted this twice
*Sunday, February 22, 2009 at 6:49pm by hayden*

**precalc/trig help please**

Duh. you are correct. Thank you
*Tuesday, February 21, 2012 at 8:48am by drwls*

**Precalc/Trig 1**

show that (√11/6)^2 + (5/6)^2 = 1 , (it is)
*Monday, October 8, 2012 at 8:53am by Reiny*

**Precalc-Max and Min word problem w/ calculator**

A cylindrical can (w/lid) needs to be construced to hold 40 cbic inches. Find the dimentions of the can so that the total amout of material needed is a minimum i dont know how to do this!! please help- do you know any sites that reteach this?
*Wednesday, October 15, 2008 at 6:44pm by Adam*

**Precalc/Trig 2**

so you given y = -√3 x^2 + y^2 = 2^2 x^2 + 3 = 4 x^2 = 1 x = ± 1 , but the point is in IV so x = 1
*Monday, October 8, 2012 at 8:57am by Reiny*

**precalc**

Suppose that z1=6-8i. Find: A. The Trig Form of the complex number z1, where your theta is in degrees. B. The Trig form of z1*z2, where z2=5[cos(60degrees)+isin(60degrees)] C. The Trig Form of (z1)^4
*Monday, December 5, 2011 at 1:34pm by Joshua*

**trig/PreCalc**

Find all real zeros of the function y = -7 + 4
*Tuesday, March 23, 2010 at 12:32am by jodi*

**Precalc with Trig**

No, I don't just my professor trying to trick us, thanks for the help!
*Sunday, April 7, 2013 at 1:42pm by Natalie*

**Precalc with Trig**

There isn't a typo this is the equation my professor gave us, thanks for the help!
*Thursday, April 11, 2013 at 2:04pm by Natalie*

**Difficult Trig Word Problem**

sorry y(t) =4e(then the exponent -3t) all times sin(2pi*t)
*Wednesday, November 14, 2012 at 5:51pm by Greg*

**trig/precalc**

bobpursely: Thank you so much! God bless you for taking the time to help!
*Tuesday, April 10, 2012 at 6:07pm by tabby*

**Precalc/Trig**

Find the smallest positive number t such that e^sin(t)=1/2
*Saturday, October 20, 2012 at 11:22pm by Liz*

**Trig/PreCalc**

Factor the Polynomial completely: 10x^4y-20x^2y^2
*Monday, December 29, 2008 at 8:01pm by Nuna*

**Trig/Precalc**

the ratio of height to shadow length is the same, so h/3.5 = 8/5 I imagine you can solve that for h.
*Sunday, November 24, 2013 at 6:06pm by Steve*

**Precalc**

Hello, good afternoon. I need help with my precalc hw. we are learning about finding zeros I dont which method I should use for this problem: if i is a zero of x^3+3x^2+ix+(4+i) what do i do? synthetic divison? or long division? when i did long division i got a werid ...
*Tuesday, October 14, 2008 at 4:06pm by Samya*

**Precalc/Trig**

what angle does the line y=6/7x make on the xy plane with a positive x axis?
*Saturday, October 20, 2012 at 11:03pm by Liz*

**Precalc/Trig**

what angle does the line y=6/7x make on the xy plane with a positive x axis?
*Saturday, October 20, 2012 at 11:04pm by Liz*

**5th Grade Math**

I didn't see how to turn that problem into a word problem on that page. Doesn't mean it's not there, I just didn't see it. She knows how to multiply the problem, it's coming up with a word problem that she can't see out of it. :)
*Monday, February 24, 2014 at 7:59pm by Sara *

**Precalc/Trig 1**

What equation would you use to show that the point ((square root of 11)/(6), (5/6))is on the unit circle?
*Monday, October 8, 2012 at 8:53am by Greg*

**Trig word problem**

a flagpole casts a shadow of 12m.the sun has an angle of elevation of 36. how tall is the flagpole?
*Sunday, February 24, 2008 at 9:42pm by briana*

**Precalc**

LS = cos(-x) - sin(-x) = cosx + sinx = RS These are based on standard trig relationships that you should know and recognize
*Tuesday, November 13, 2012 at 9:43am by Reiny*

**MAT115**

A Word problem teaches you how to think and tests your ability to understand what you are reading. Your way of stating the problem is easier to understand. But there is only 2 words in it. So it may or may not qualify as a true Word problem.
*Thursday, July 22, 2010 at 12:44pm by Henry*

**precalc/trig help please**

The area of a circle is 18pi square meters. What is the radius (leaving answer in simplest radical form)
*Tuesday, February 21, 2012 at 8:48am by Carlee'*

**precalc/Trig**

using the same addition formulas as before, note that 82.5 = 60 + 22.5 12 = 30-18
*Saturday, November 10, 2012 at 2:11am by Steve*

**Precalc/Trig 2**

The point P lies in the 4th quadrant and is located on a circle of radius 2. Find the missing coordinate for P. (___, (negative square root of 3)).
*Monday, October 8, 2012 at 8:57am by Greg*

**trig/precalc**

actually, that's heading, not bearing. Adding up the x- and y-components of the two speeds, you get (507.1,531.2) so, the speed is 734.4 mph at N43.7°E
*Sunday, December 16, 2012 at 5:35pm by Steve*

**Precalc-possible or impossible (trig)**

is this possible? sec __=-.04
*Monday, December 8, 2008 at 12:00am by yv*

**Precalc with Trig**

What value(s) of x from 0 to 2pi solve the following equation: cos squared x - cos x - 6 = 0
*Thursday, April 11, 2013 at 2:04pm by Natalie*

**precalc and trig**

i posted a sorry. i posted this twice on that one. And i dont understand how RS=LS and thanks
*Sunday, February 22, 2009 at 8:18pm by hayden*

**precalc/trig**

Solve the Logarithmic equation algebraically. Give an Exact Answer and an approximation for x to four decimal places. 20 log(2x+2)=45
*Monday, December 5, 2011 at 2:01pm by Alexander*

**math-word problem**

The width of a rectangle is fixed at 21cm. What lengths will make the perimeter greater than 80cm. Please help with this word problem I do not even know where to begin.
*Saturday, July 31, 2010 at 4:18pm by Michelle*

**precalc/trig**

Write the partial fraction decomposition of the rational expression. 4x^2–19x+31/ (x+2)(x^2–4x+5)
*Saturday, December 3, 2011 at 11:19am by Robert*

**Precalc with Trig**

cos^2 Ø - sin^2 Ø = 6 cos 2Ø = 6 no solution, the cosine of anything cannot be greater than 1 do you have a typo?
*Sunday, April 7, 2013 at 1:42pm by Reiny*

**Algebra**

Word Problem: Jack mows the lawn in 4 hours, mary mows the lawn in 5 hours. how long will it take them if they mowed the lawn together? I have a hard time figuring out which formula to use to solve a problem in a word problem can anyone help and tell me how to set up the ...
*Saturday, October 18, 2008 at 11:43am by Laura*

**Math**

Create an addition word problem and a subtraction word problem using fractions. Show how to find the solution to each problem. Once you find the solutions to your problems, rewrite the solutions as either a terminating or nonterminating decimal.
*Monday, October 1, 2012 at 1:19pm by Christian*

**trig**

the sigma was the E and that questions that I posted is word by word what the question actually says which now makes me think there must be a typo
*Sunday, March 6, 2011 at 10:34pm by Bennett*

**precalc/trig**

Find the trigonometric form of the number. (Round any angles to two decimal places.) −8 − i
*Tuesday, November 29, 2011 at 11:27am by Alex*

**Precalc/Trig**

The slope of a line is the same as the tanØ , where Ø is the angle it makes with the x-axis so in y = 6/7x we have tanØ = 6/7 Ø = appr. 40.6°
*Saturday, October 20, 2012 at 11:04pm by Reiny*

**accounting**

Hmmmmmm. The prompt does not say that word problem needed to be solvable? :) Try some of the following to see if you can get ideas: http://search.yahoo.com/search?fr=mcafee&p=for+accounting%2C+design+a+word+problem+involving+a+discounted+price Do you know what your teacher ...
*Saturday, January 29, 2011 at 5:53pm by SraJMcGin*

**Difficult Trig Word Problem**

I am not sure what the exponent is the way you typed it using no brackets, it would be (4e^-3) * tsin(2πt) or is it 4e^( -3tsin(2πt) )
*Wednesday, November 14, 2012 at 5:51pm by Reiny*

**Precalc**

In the problem before it says r(x)= (x^5 - c^5)/(x-c) Maybe it's referring to that? Does that help?
*Wednesday, January 18, 2012 at 6:51pm by Grace*

**math-ms sue please**

Ms Sue thank you for the help with my other word problem can you check this one for me? Write a word problem and find the solution to the equation. 1/2-2/3 THe answer is -1/6 and the word problem I created is: Janet put 6 suckers on a table. 3 suckers were watermelon and 3 ...
*Wednesday, October 27, 2010 at 2:20pm by m*

**Algebra**

That's the problem. You see, if it had said how many kids or how many girls there are, that would have helped. I copied the problem word for word, so that's all there is. Maybe my teacher messed up and forgot some info. Thanks for helping! :)
*Tuesday, October 28, 2008 at 4:18pm by Celina*

**Trig?Precalc**

write the rectangular equation x^2+y^2=6 in polar form. I do not want people to just post the answer! Please, show your work so that I can understand how to do these kinds of problems myself! Thank you and God Bless!
*Thursday, April 19, 2012 at 12:40pm by tabby*

**trig**

I'm trying to see if the teacher didn't give us the right problem or if I'm just not getting it. The problem is "re-write the expression without a fraction: 4/(1-sin x)". I can do it if the problem is sin squared x but I don't know how to solve the problem given. Pls help. thx
*Saturday, September 19, 2009 at 5:30pm by Priscilla*

**pre-alg**

I need help to create an addition word problem and a subtraction word problem using fractions. I need to show how to find the solution to each problem. Once I find the solutions to my problems, I have to rewrite the solutions as either a terminating or nonterminating decimal.
*Wednesday, October 16, 2013 at 2:01pm by AudioslavedCobain182*

**Math- Precalc**

could someone please help me solve this problem... e^x - 12e^(-x) - 1
*Monday, November 15, 2010 at 7:16pm by Alex*

**precalc help**

cos (30/2) then see the problem below this one
*Monday, January 23, 2012 at 9:54am by Damon*

**9th grade math word problems**

1. If Larry is 13 today and his sister is 5, add 3 years and Larry will be 146 and his sister will be 8. Here are some word problem tutorials. Look through them to see if you can find something to help you: http://search.yahoo.com/search?fr=mcafee&p=word+problem+tutorials That...
*Thursday, April 7, 2011 at 4:51pm by SraJMcGin*

**PreCalc (Sine)**

I meant to include the webpage on the CAST rule http://www.physics.uoguelph.ca/tutorials/trig/trigonom2.html
*Thursday, October 25, 2007 at 10:36pm by Reiny*

**Math**

No. When a problem in percent is presented, often it has the word of in it. For example, in this problem, "His total deductions are 30% of his pay." When the word of is used in this manner, it means times. So 0.30 x 2080 = the amount deducted.
*Wednesday, July 16, 2008 at 4:05pm by DrBob222*

**Algebra Word Problem**

My question is already posted, name pj , school subject, Algebra Word Problem
*Sunday, November 16, 2008 at 1:23pm by pj*

**Precalc**

I wish I could say that's why I don't understand this problem. But sadly, I still don't get it. Haha.
*Wednesday, January 18, 2012 at 6:51pm by Grace*

**Trig**

Find an equation for the hyperbola described. Foci at (-4,0) and (4,0); asymptote the line y= -x. Please explain the steps of this problem. My book does not get an example of this type of problem and I'm not having any luck working this problem.
*Tuesday, July 19, 2011 at 11:08pm by EVJ*

**Precalc-possible or impossible (trig)**

nope, not defined the secant is the reciprocal of the cosine. The cosine function has a range between -1 and 1 so the secant of any angle has to be ≥ 1 or ≤ -1
*Monday, December 8, 2008 at 12:00am by Reiny*

**Trig**

HELP!!!! I dont know how to do the trig identity with this problem csc^4 x-cot^4x= Csx^2 x + cot^2x
*Thursday, March 8, 2012 at 9:04am by Quetzally*

**precalc**

I get 18.6 95 - Did you see my repair of the sign error I made in your hyperbola problem?
*Saturday, January 14, 2012 at 6:26pm by Damon*

**precalc and trig**

cos^2 (a+x) -sin^2 a=cos x * cos(2a+x)
*Sunday, February 22, 2009 at 8:18pm by hayden*

**precalc/trig help please**

pi*R^2 = 18*pi R^2 = 18 R = 3*sqrt2 m^2 = = 4.24 m^2
*Tuesday, February 21, 2012 at 8:48am by drwls*

**precalc/trig**

olve for the interval [0, 2pi]. cos(x+ pi/4)+cos(x- pi/4)=1
*Thursday, November 29, 2012 at 1:25am by bob*

**another precalc word problem**

The Cruiser Bicycle Company makes two styles of bicycles: the Traveler, which sells for $200, and the Tourister, which sells for $600. Each bicycle has the same frame and tires, but the assembly and painting time required for the Traveler is only 1 hour, while it is 3 hours ...
*Saturday, September 25, 2010 at 7:06pm by Janis*

**Precalc and trig**

cos^2 (x+a)-sin^2(a)= (cos x)(cos (2a+x)) prove using only side i worked on the left side...
*Sunday, February 22, 2009 at 6:49pm by hayden*

**precalc/trig**

log(2x+2) = 45/20 = 2.25 assuming natural logs, 2x+2 = e^2.25 x = (e^2.25 - 2)/2 x = 3.7439
*Monday, December 5, 2011 at 2:01pm by Steve*

**Precalc with Trig**

cos^2 - cos - 6 = 0 (cos-3)(cos+2) = 0 cos = 3 or -2 Bzzzt. |cos| <= 1, so not possible. If there's a typo, fix it and apply the same steps.
*Thursday, April 11, 2013 at 2:04pm by Steve*

**Precalc and trig**

thanks for catching that typo, it is so hard to type those complicated trig expressions without making some errors. on RS it looks like I forgot to multiply cosx by that last term so from cosx[cos^2acosx – sin^2acosx – 2sinacosasinx] = cos^2acos^2x – sin^2acos^2x - ...
*Sunday, February 22, 2009 at 6:49pm by Reiny*

**math word problem**

thank you!! On this problem x - 3/4 + 1/6 = 17/12 can you help on where to take this problem on with the steps?
*Thursday, October 21, 2010 at 10:11pm by Aly*

**precalc**

General and standard form mean the same thing to me. The equation I wrote is for the specific circle that the problem asked for.
*Saturday, August 16, 2008 at 7:26am by drwls*

**precalc please**

I suspect you need the sine of the sum of two angles, 45+30 Sin(A+B)=SinAcosB+cosAsinB http://www.sosmath.com/trig/Trig5/trig5/trig5.html I suspect you are suffering from lack of routine use of flash cards. Millions of students before you have suffered thru memorizing these, ...
*Monday, January 23, 2012 at 9:46am by bobpursley*

**Business English **

First of all, go through and correct the spelling errors and word choice errors. (Word choice is making sure you use the correct verb form for the sentence or the correct word, not another word that doesn't quite mean the same thing.) Do you have an English spell-checker in ...
*Friday, November 11, 2011 at 2:30pm by Writeacher*

**Precalc/Trig**

just plug in you addition formulas: sin(u+v) = sinu cosv + sinv cosu = (2/5)(1/3) + (√21/5)(√8/3) = 2(1+√42)/15 do the others likewise. If necessary, draw triangles and label the sides to evaluate the other functions of u,v,x,y
*Saturday, November 10, 2012 at 12:48am by Steve*

**Subsitution Method Grrr**

Actuaally, it was a word problem and that's the equation I got out of it. Here is the word problem. Students sold 275 tickets for a fundraiser at school. Some tickets are for the children and cost $3 while the rest are adult tickets that cost $5. If the total value of all the ...
*Tuesday, February 11, 2014 at 5:07pm by andra *

**Trig/PreCalc**

10x2y(x2 -2y)
*Monday, December 29, 2008 at 8:01pm by bobpursley*

**Trig?Precalc**

Do you not recognize the equation as that for a circle of radius √6 ? its center is at (0,0), so it's the most basic of any polar equation: r = 6 FYI, if you want us to show our work, show us how far you got, so we know where to concentrate the help.
*Thursday, April 19, 2012 at 12:40pm by Steve*

**Algebra **

This isn't a question. This is a statement, telling you why a solution to a word problem should be checked to the original wording of the problem versus the equation written for the problem. This is because the equation, derived from the wording of the problem, could be wrong.
*Wednesday, February 2, 2011 at 3:20pm by helper*

**word problem elementary reposed**

I don't have any idea. I am bad at word problems
*Saturday, August 8, 2009 at 9:06pm by Heather*

**Precalc/Trig**

Find all values of x, 0<x<(pi/2) for which (1/( root 3))<cotx<(root 3)
*Wednesday, October 10, 2012 at 7:22pm by Patrick*

**Trig**

How do i set this trig problem up? PLEASE help me. Find tan (s + t) given that sin s = 1/4, with s in quadrant 2, and sin t = -1/2, with t in quadrant 4.
*Monday, May 3, 2010 at 1:06am by Dave*

**Difficult Trig Word Problem**

y = 4^(-3t) * sin(2πt) so if we set y = 0 4^(-3t) = 0 ----> so solution or sin(2πt) = 0 2πt = 0 or 2πt = π or 2πt = 2π or .. t = 0 or t = 1/2 or t = 1 or t= .. looks like every half second, starting with t = 0
*Wednesday, November 14, 2012 at 5:51pm by Reiny*

**Trigonometry**

Use the trig Identities to find the other 5 trig functions. Problem 7.)Tan(90-x)=-3/8 8.)Csc x=-13/5 9.)Cot x=square root of 3 10.)Sin(90-x)=-.4563 11.)Sec(-x)=4 12.)Cos x=-.2351 I need HELP!
*Tuesday, January 5, 2010 at 4:09pm by Jennifer*

**Having some trouble...**

I'm having some trouble answering the word problem for question #2 because the ending part confuses me in doing the steps at the begining of the word problem.
*Sunday, November 23, 2008 at 4:23pm by Lisa*

**Word problem math**

Word problem. You cut a 2 m long board into 2 pieces . One piece is 10 cm shorter than the other. How long are each boards.? I got. 1 pc at 80!cm. the other 1pc at 100 cm Is this right ?
*Sunday, October 14, 2012 at 4:54pm by Marco*

**Precalc**

I know at 7% interest an investment will double in 10 years, but this doesn't help you. let me see what I can find is your problem simple interest?
*Wednesday, January 12, 2011 at 7:36pm by helper*

**Precalc/Trig**

wave is modeled by the function ... h(t) = 3cos(p/10)*t What is the period of the wave (T) *frequency (F) is defined as the number of cycles of the motion per second. What is the relationship between F and T? Find the wave height (H) which is the vertical distance between the ...
*Wednesday, September 26, 2012 at 9:17am by George*

**Trig/PreCalc**

Teach me how to express 5sqrt3 - 5i in polar form please. I don't want you to do the work for me. Just show me the steps I need to do the work properly on my own. Otherwise I will not pass this class or the exam when I enter college, and I do not want to retake PreCalc. Its a ...
*Friday, April 13, 2012 at 3:44pm by tabby*

**Trigonometry**

I cannot give a general answer to your question without seeing the actual problem In solving trig equations, you have to consider that each trig ratio is positive in 2 different quadrants and is negative in 2 different quadrants Usually answers are neede for the domain between...
*Wednesday, June 9, 2010 at 5:11pm by Reiny*

**Precalc/Trig**

evaluate the expression assuming that cos(x)=1/7, sin(y)=1/3, sin(u)=2/5 and cos(v)=1/3. what is cos(u+v)? sin(x-y)? and tan(u-v)?
*Saturday, November 10, 2012 at 12:48am by Liz*

**PHYSICS (HELP!!!)**

Are you kidding me? I'm in that MIT online class too, and you copied the TEST problem word for word! Did you even bother to read the honor code?!
*Friday, November 1, 2013 at 3:27pm by Anonymous*

**precalc/trig**

y = -1 x = -8 tanθ = y/x = 8 arctan 8 = 82.87° = 1.45 θ = 1.45 + pi = 4.59 r^2 = 1+64 = 65 So, -8-i = (√65,4.59)
*Tuesday, November 29, 2011 at 11:27am by Steve*

**college trig word problem**

A Ferris wheel has a radius of 25 feet.The wheel is rotating at two revolutions per minute.Find the linear speed, in feet per minute, of a seat on this ferris wheel.
*Saturday, December 15, 2012 at 2:16am by Joel*

**trig/precalc**

y= A sin Theta you can graph that. Now let A= 3.55 Now let theta= x-PI/4 That means theta is zero when x=PI/4. So it is a sine curve shifted to the right by PI/4 You can plot that.
*Tuesday, April 10, 2012 at 6:07pm by bobpursley*

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