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versado
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Post #506315 |
Member
5:13 am, Nov 9 2011
Posts: 1
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Another country that might be worth looking at is Australia, though their version of Medicare is a universal one instead of targeting the elderly. As far as topics, you may want to take a look at how they both handle prescription drugs. Australia seems to have an organization specifically for that called the Pharmaceutical Benefits Scheme (PBS). I really don't know much about this topic, just figured another suggestion wouldn't hurt. Here are links for the main Medicare page and PBS.
http://www.medicareaustralia.gov.au/
http://www.pbs.gov.au/pbs/home
I've got a favor for anyone who is bored. I had to create a survey as research for a paper I'm writing on net neutrality. Its pretty simplistic and I apologize if it seems biased or the questions uninformed. Its fairly short with 11 questions. The survey is targeted at residents of the United States but I welcome responses from anyone. Thank you to anyone who takes the time to fill it out.
http://www.zoomerang.com/Survey/WEB22DKEF49YVJ
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ohwhatsherface
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Post #506722 |
Member
6:37 am, Nov 11 2011
Posts: 8
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Quote from ohwhatsherface How do I show that...
1. sin(arccos(x)) = the square root of 1-x^2?
2. cos(arctan(3/x)) = (x) / (the square root of x^2+9)?
Hello everyone! I'm in 2nd year college taking a 1st year calc course. I've been doing ok so far, but I'm really unfamiliar with these two problems. Can someone explain to me how to do it? 
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MewMan
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Post #506726 |
hmm~
Member
7:18 am, Nov 11 2011
Posts: 896
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1. arccos(x) = y ---> cos(y) = x and sin(arccos(x)) = sin(y)
and we know that sin^2(y)+cos^2(y) = 1
2. same as above.
just a reminder though: cos^2(x) = 1/(tan^2(x) + 1)
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sarah-eats-cupcakes
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Post #506733 - Reply to ( #506726) by MewMan |
his and her sonnet
Member
8:04 am, Nov 11 2011
Posts: 1110
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Quote from MewMan 1. arccos(x) = y ---> cos(y) = x and sin(arccos(x)) = sin(y)
and we know that sin^2(y)+cos^2(y) = 1
just to make things clear...what is the question here?
are you supposed to prove that sin^2(y)+cos^2(y) = 1 from the information, or viceversa?
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Pocono
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Post #506919 - Reply to ( #506733) by sarah-eats-cupcakes |
Say My Name.
Member
10:36 am, Nov 12 2011
Posts: 164
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Quote from sarah-eats-cupcakes Quote from MewMan 1. arccos(x) = y ---> cos(y) = x and sin(arccos(x)) = sin(y)
and we know that sin^2(y)+cos^2(y) = 1
just to make things clear...what is the question here? are you supposed to prove that sin^2(y)+cos^2(y) = 1 from the information, or viceversa?
the actual question is one post above his and it,s pretty much already answered. you gotta use the identities he,s given then it,s straightforward.
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Cancer is boring.
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chineserider
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Post #517959 |
Persona non grata
Member
10:27 pm, Jan 18 2012
Posts: 1439
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Can someone use the definition of Maclaurin series to get the first three nonzero terms of f(x)=tanx please?
I know the answer is tanx= x + 1/3x^3 + 2/15x^5... but I can't seem to get the answer from the definition.
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Nulla in mundo pax sincera
"Always go too far, because that's where you'll find the truth." - Albert Camus |
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Pikapu
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Post #522037 |
-_-
 Member
10:15 pm, Feb 8 2012
Posts: 1885
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A couple chemistry problems:
Le click.
For number five, I understand that you have to solve it using an ICE box... I am just confused how.
If you are able to help me, please PM me!!!
I also need help with a buttload of kinetics problems... (I am confused as fyck). If someone is really good at chemistry, please message me!
Begging for help,
Pika.
________________
Quote from LawX You are like the dense main character in a shoujo manga. Quote from Crenshinibon And you will murder someone one day, pika. If you're my daughter.
PLAY WITH ME IN DIABLO 3!
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jelzin89
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Post #522044 - Reply to ( #522037) by Pikapu |
Member
11:01 pm, Feb 8 2012
Posts: 226
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Quote from Pikapu A couple chemistry problems: Le click. For number five, I understand that you have to solve it using an ICE box... I am just confused how. If you are able to help me, please PM me!!! I also need help with a buttload of kinetics problems... (I am confused as fyck). If someone is really good at chemistry, please message me! Begging for help, Pika.
is M= mol/l ?
if so : the equilibrium is self-adjusting.so the concentration of the right side is 0.337 M(HOCl) = 0.674 mol
therefore: 2.651 mol - 0.674 mol = the overall amount of substance for the left side(= a)
from the chemical equation follows: n(HCl)= 2*n(O_2)
--> n(O_2) = a/3
from here on you can easily calculate c(O_2).
should you need K_c you have to use the law of mass-action (I think).
since the volume is constant you can substitute c(O_2) with c(HCl) -> the amount follows from the chemical equation. think about the rest for yourself.
for number 8 : the squared brackets usually mean concentrations which you'll already know. so you can calculate the overall amount of substance and do sth with it.I'm too lazy to do that now.
00.00 AM good night
Last edited by jelzin89 at 11:07 pm, Feb 8
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MewMan
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Post #523395 |
hmm~
Member
2:41 pm, Feb 15 2012
Posts: 896
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r(t)=sin(t)
s(t)=sin(2t)
here are the graphs:
 
I want to find the points of intersection
According to the graphs, there should be three sets of them
However, I could only find two (at t=0 and t=pi/3; got them by solving sin(t)=sin(2t) )
Help, anyone?
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nugak
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Post #523399 |
Member
3:09 pm, Feb 15 2012
Posts: 1
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actually, you found the third one.
from sin(t) = sin(2t), you have t = pi/3
you can find there is another solution.
Hint, theres a negative solution
Last edited by nugak at 3:19 pm, Feb 15
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MewMan
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Post #523469 |
hmm~
Member
8:42 pm, Feb 15 2012
Posts: 896
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wow, you actually registered an account just to answer my question
I'm deeply moved and really appreciate it 
though your reply is not what I'm looking for XD
anyway,
about the missing point, it probably has something to do with the directed distance in polar coordinate
(r, ϕ) = (-r, ϕ+ π)
so I devised an equation system for finding points of intersection:
sin(t)=sin(2t)
and -sin(t+ π)=sin(2t)
worked like a charm
or so it should have.
it did returned 3 sets of points, but not exactly what I was expecting:
t= π/3 or - π/3 or 0
no no, according to the graphs, it should have been t= π/3 or 2π/3 or 0
though if you think about it, both answers are right 
let's try another example:
r(t)=4sin(2t) (same graph as above)
r=2 (a circle with radius = 2, centered at origin)
now, according to the graphs, there should be 8 sets of points of intersection
I tried my system of equations to see if I could find all of them
did I?
nah, I only found four, which were: t= π/3 or - π/3 or 2π/3 or -2π/3
it turned out that if I want to find the remaining 4, I would have to reason using directed distance in polar coordinate ( (r, ϕ) = (-r, ϕ+ π) ) again
but if I add this reasoning to my equation system, and apply it to the original problem, there will be 5 sets of points instead of 3
and then I think, wait, what if all I have been doing till now is finding the angles where the intersection happens, instead of the points themselves?
it makes perfect sense!!
Can someone tell me how to find the exact points, instead of just the angles?
Last edited by MewMan at 8:48 pm, Feb 15
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StarlightDreams
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Post #523507 |
Member
11:53 pm, Feb 15 2012
Posts: 3870
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The negative equivalent of pi/3 isn't one of the points? -5pi/3?
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Cherelle Ashlee
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Post #523513 |
Shoujo Queen
Member
11:59 pm, Feb 15 2012
Posts: 337
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Can anyone help me with this math equation please!! This is my last question but I cant seem to get it ( This is system of equations)
At the beginning of a new semester, Andy makes plans for a successful semester. He allocates 42 hours per week for study time for the four courses he is taking: Math English, Chemistry and History. He decides to allocate half of his time to Math and English, and two as much time to Math as to English. He decides to allocate twice as much to English as to History.
a) find a sytem of equations that represents this information.
b) solve the system to determine the number of hours allocated to each subject.
Can anyone help please!!
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StarlightDreams
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Post #523525 - Reply to ( #523513) by Cherelle Ashlee |
Member
12:19 am, Feb 16 2012
Posts: 3870
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Quote from Cherelle Ashlee Can anyone help me with this math equation please!! This is my last question but I cant seem to get it ( This is system of equations)
At the beginning of a new semester, Andy makes plans for a successful semester. He allocates 42 hours per week for study time for the four courses he is taking: Math English, Chemistry and History. He decides to allocate half of his time to Math and English, and two as much time to Math as to English. He decides to allocate twice as much to English as to History.
a) find a sytem of equations that represents this information.
b) solve the system to determine the number of hours allocated to each subject.
Can anyone help please!!
Make variables for each subject. M = Math, E = English, C = Chem, H = History
21 = M + E <- It says he allocated half of the time to math and english.
M = 2E <- It says that that he allocates twice as much time to math as to english
E = 2H <- allocates twice as much to English as to history
M + E + C + H = 42
Start with the first two equations.
21 = M + E and M = 2E
Do the system of equations for those two variables. Once you do that, plug in whatever you got for E into the third equation and solve for H. Now you have 3/4 variables found and can find C by adding M, E, and H together and subtracting it from 42.
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Sagaris
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Post #523527 - Reply to ( #523525) by StarlightDreams |
Member
12:32 am, Feb 16 2012
Posts: 3094
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Quote from StarlightDreams M + E + C + H = 42
Yes, Mech is the answer to life, the universe, and everything.
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