The Ring Of Solomon
Released In:
| We hope you enjoy your visit. You're currently viewing our forum as a guest. This means you're limited to certain parts of the forum, and certain features. These include your own account and the ability to view answered questions by Jonathan Stroud. All you need to do is to register which takes a few seconds. Join our community! If you're already a member please log in to your account to access all of our features: |
| Math Help Please; >.< | |
|---|---|
| Topic Started: Mar 3 2010, 02:54 AM (204 Views) | |
| Mwamba | Mar 3 2010, 02:54 AM Post #1 |
[Penguin Overlord]
|
The specific problems are trig ones: Find all of the solutions of the following equations in the interval [0,2π) (3tan^2)2x-1=0 csc^2 (πx/2)-4=0 tan^x*cscx=tan^2 x 2cos(x/2)-3^(1/3)=0 2sin^2 x+5sinx-3=0 Edited by Mwamba, Mar 3 2010, 03:03 AM.
|
|
Washington is Hollywood for ugly people. Miracles are like pimples, because once you start looking for them you find more than you'd ever dream you see. | |
| Offline Profile | Quote Top |
| Gladstone | Mar 3 2010, 03:20 AM Post #2 |
 
|
Senty is the man for this. But I *think* I've worked out the first one... I haven't done Maths for two years so hopefully you have an answer book where you can check this? If not someone else correct me. (3tan^2)2x-1=0 (3tan^2)2x = 1 3(tan2x)^2 = 1 tan2x^2 = 1/3 tan2x = SQR(1/3) 2x = tan^-1 SQR(1/3) 2x = 30 x = 15 (degrees) x = 0.262 (rad) |
| Gladstone > Disraeli | |
| Offline Profile | Quote Top |
| nathanielandbartimaeus | Mar 3 2010, 11:52 AM Post #3 |
Golem
|
You are getting your maths HW done from us? I know trig pretty well. And I am pretty sure I can solve all that (because they look simple), but the problem being, I am finding it difficult to make head or tail of this typed stuff. I need to write it properly down and try. I could do it by today evening. Edited by nathanielandbartimaeus, Mar 3 2010, 11:57 AM.
|
Falling in love is not at all the most stupid thing that people do — but gravitation cannot be held responsible for it. | |
| Offline Profile | Quote Top |
| Sentynel | Mar 3 2010, 02:27 PM Post #4 |
Nothing But The Rain
|
Let me introduce you to the genius that is Wolfram Alpha. This is the final problem you listed: http://www.wolframalpha.com/input/?i=2*%28sin%28x%29%29^2+%2B+5*sin%28x%29+-+3+%3D+0 Your notation is a little inconsistent, so you'll have to check that it reads it correctly. Incidentally, Gladstone's solution for the first one is correct, but fails to take into account the negative square root and the repetition period of the function. Solutions are thus given by x = (1/12) (6 pi n - pi) and x = (1/12) (6 pi n + pi), for all whole number values of n that give x in the required range (between 0 and 2 pi). Thus, there are solutions at pi/12 (the one he found), 7pi/12, 13pi/12, 19pi/12, 5pi/12, 17pi/12, and 23pi/12. |
|
Sentynel - Head Ninja, Admin, Keeper of the Ban Afrit, Official Forum Graphics Guy, I love Jen, and forum code debugger. <MrCat> youi psaychichbasterad | |
| Offline Profile | Quote Top |
| *magykgurl* | Mar 3 2010, 02:29 PM Post #5 |
Foliot
|
Ew ew EW. MATH. |
| ___________________________________________________*.<3.X _____________________________________________________ | |
| Offline Profile | Quote Top |
| nathanielandbartimaeus | Mar 3 2010, 02:35 PM Post #6 |
|
Golem
|
That one is brilliant. |
Falling in love is not at all the most stupid thing that people do — but gravitation cannot be held responsible for it. | |
| Offline Profile | Quote Top |
| Mwamba | Mar 5 2010, 01:31 AM Post #7 |
|
[Penguin Overlord]
|
Ah. Niceness. |
|
Washington is Hollywood for ugly people. Miracles are like pimples, because once you start looking for them you find more than you'd ever dream you see. | |
| Offline Profile | Quote Top |
| footnoodles | Mar 5 2010, 03:57 AM Post #8 |
Mouler
|
Holycabbage I love math. -EDIT- FASDFURH BEST CENSOR EVER I'VE NEVER LAUGHED THIS HARD Edited by footnoodles, Mar 5 2010, 03:57 AM.
|
| Offline Profile | Quote Top |
| Mwamba | Mar 5 2010, 04:10 AM Post #9 |
|
[Penguin Overlord]
|
Huh? flooping 'eck cabbage Bullcabbage cabbage Damn Ass Bitch What censors are you speaking of? I'm confused. Edited by Mwamba, Mar 5 2010, 04:10 AM.
|
|
Washington is Hollywood for ugly people. Miracles are like pimples, because once you start looking for them you find more than you'd ever dream you see. | |
| Offline Profile | Quote Top |
| Gladstone | Mar 5 2010, 04:17 AM Post #10 |
|
Take a guess, unless you do actually use the word 'cabbage' in place of ... something else. |
| Gladstone > Disraeli | |
| Offline Profile | Quote Top |
| Mwamba | Mar 5 2010, 03:35 PM Post #11 |
|
[Penguin Overlord]
|
Ah. Somehow I skipped over the first paragraph. I thought the censored swear was 'FASDFURH' |
|
Washington is Hollywood for ugly people. Miracles are like pimples, because once you start looking for them you find more than you'd ever dream you see. | |
| Offline Profile | Quote Top |
| footnoodles | Mar 6 2010, 02:15 AM Post #12 |
|
Mouler
|
That would be a good censor too. |
| Offline Profile | Quote Top |
| 1 user reading this topic (1 Guest and 0 Anonymous) | |
| « Previous Topic · General Chat · Next Topic » |
