|
|
| Author |
Message |
Hello1234
Group: Members
Joined: 18 Apr 2008
Posts: 5
Gold: 0.03
Status:
Warn: 
Reputation: 0
|
 #1 Posted: 18 Apr 2008 11:08 pm Post subject: Grade 11 Functions |
 |
|
I know you all are smart so here is what im confused about. Sorta simple stuff I think...
When they say like sinA = (random negative ratio) and then solve for A when 0<A<360, two answers appear. Is it that angle must be equal to any ratio as long as it is less than 360 and greater than 0?
Number 2: I don't understand how tanA = (some negative ratio) gives a negative angle, but since it must be less than 360 and great than 0 a random positive answer appears...
I need someone to teach me this lol. The whole angles area of grade 11 math.
-Hello1234 |
|
| Back to top |
|
 |
tramway
Group: Admin
Joined: 24 Jan 2007
Donor: 
Posts: 4548
Gold: 2191.53
Clan: D3JSP
Status:
Warn:
Reputation: 187
|
| #2 Posted: 18 Apr 2008 11:35 pm Post subject: |
|
|
Umm im not sure what u are asking, but your answer is limited from 0-360 because it repeats itself afterwards. So basically you can have infinite answers, but they only want you to answer whats between 0-360
_____________________
If your gold is locked, please PM a senior moderator. They will be able to unlock you |
|
| Back to top |
|
|
PhoenixFire
Group: Members
Joined: 26 Feb 2007
Posts: 579
Gold: 777.36
Clan: Arcadians
Status:
Warn:
Reputation: 10
|
| #3 Posted: 19 Apr 2008 01:03 am Post subject: Re: Grade 11 Functions |
|
|
| Hello1234 wrote: | I know you all are smart so here is what im confused about. Sorta simple stuff I think...
When they say like sinA = (random negative ratio) and then solve for A when 0<A<360, two answers appear. Is it that angle must be equal to any ratio as long as it is less than 360 and greater than 0?
Number 2: I don't understand how tanA = (some negative ratio) gives a negative angle, but since it must be less than 360 and great than 0 a random positive answer appears...
I need someone to teach me this lol. The whole angles area of grade 11 math.
-Hello1234 |
isn't this basic grade 10 trig?
_____________________
 |
|
| Back to top |
|
|
marinepower
Group: Members
Joined: 04 Dec 2007
Posts: 229
Gold: Locked
Status:
Warn:
Reputation: 4
|
| #4 Posted: 19 Apr 2008 03:01 pm Post subject: |
|
|
In some places they teach Algebra 2 first. But yeah, could you actually post a sample problem? No one understands what you mean atm.
EDIT: If you are using a ti calculator to figure this out, set the mode from radian to degree.
Last edited by marinepower on 19 Apr 2008 03:04 pm; edited 1 time in total
_____________________
¥öû Пåvë Гчst ßëèn Oшизd ИooВ 1337 §£i||з ^_º
ಠ_ಠ ⌠҈ʭ☼♰♱␀♱♰☼ʭ҈⌡ރȫϮ
Last edited by tramway on Sun May 11, 2008 12:04 pm; edited 1 time in total |
|
| Back to top |
|
|
Hello1234
Group: Members
Joined: 18 Apr 2008
Posts: 5
Gold: 0.03
Status:
Warn:
Reputation: 0
|
| #5 Posted: 19 Apr 2008 03:05 pm Post subject: |
|
|
| Srry guys for my unclear question.. I guess ill just try to figure it out myself somehow thanks anyways |
|
| Back to top |
|
|
Steffer
Group: Members
Joined: 23 Sep 2009
Posts: 37
Gold: 12.50
Status:
Warn:
Reputation: 0
|
| #6 Posted: 27 Sep 2009 08:55 am Post subject: Re: Grade 11 Functions |
|
|
| Hello1234 wrote: | I know you all are smart so here is what im confused about. Sorta simple stuff I think...
When they say like sinA = (random negative ratio) and then solve for A when 0<A<360, two answers appear. Is it that angle must be equal to any ratio as long as it is less than 360 and greater than 0?
Number 2: I don't understand how tanA = (some negative ratio) gives a negative angle, but since it must be less than 360 and great than 0 a random positive answer appears...
I need someone to teach me this lol. The whole angles area of grade 11 math.
-Hello1234 |
question #1:
sin(x) is cyclic, look here:
x1 = 0 = 0°
x2 = 3,1214 = pi = 180°
x3 = 6,2.... = 2pi = 360°
y(x) = y(x+2pi)
because a period of a circle is 2pi = 360°
question#2:
just look at this picture 
same period but another function tan(x) =sin(x)/cos(x)
Last edited by Steffer on 27 Sep 2009 08:56 am; edited 1 time in total |
|
| Back to top |
|
|
|
|
EternalSilence
Group: Members
Joined: 21 Mar 2011
Posts: 238
Gold: 31.60
Clan: Amazing Virgins
Status:
Warn:
Reputation: 14
|
| #7 Posted: 03 Apr 2011 06:11 pm Post subject: |
|
|
| what he said ^^ |
|
| Back to top |
|
|
|
RPG
Arcade
FAQ/Rules
Search
Memberlist
Usergroups
Live Chat
Log in
Register
