Quadratic Graphs?

Tue Feb 10, 2004 10:20 am by Aod

Alright you lot this is a test on your brains
if you can work out what kinda shape this
equation will form i will give you, er... something:
sin (6 cos r+50 ) <- 0.3
it really exists

Tue Feb 10, 2004 10:22 am by Warlord Bob

Not on a cartesian coordinate graph it doesn't. Where are your x and y... and what's that r doing in there?

Tue Feb 10, 2004 10:23 am by Recusant

a variable of r?
Are you using polar co-ordinates or what? I'm not sure what you're trying to get at here, normally a graph is expressed in the format: y = f(x)

Edited by - Recusant on 2/10/2004 10:23:47 AM

Tue Feb 10, 2004 10:48 am by Aod

think

repetetive patterns

Tue Feb 10, 2004 10:57 am by Recusant

well any sinusoidal graph will give you a repetitive pattern

Tue Feb 10, 2004 11:59 am by Warlord Bob

Well, sin of anything gives you a sin-wave, and it's only points less than -.03 so it's going to be somthing like ...uuuuuuuuuuuuuuu... regardless right? I just dont see A: How to graph it with no "X" unless you substitute R for X but I doubt that's your intent and consequently B: The significance of 6cos or +50r.

Tue Feb 10, 2004 1:07 pm by Eh_Steve

I'm only in Geometry but I know that you should use y=mx+b

"And at least once an episode, EH STEVE will stop by to deliver his classic line: 'EH STEVE!'" - Strong Bad Homesterrunner.com

Tue Feb 10, 2004 1:12 pm by Griffon_26

your sin must be punished

Wed Feb 11, 2004 12:43 pm by Sh|ft

y=mx+b

That's only for linear graphs, aka "straight lines". He's talking about a non-linear graph. As for the graph, assuming that R is X, then someone run this through QBasic:

Screen 12

For R = 0 to 640
Y = (Sin (6 * cos * r + 50 ) ) * 3 / 4
Pset (R, Y), 15
Next

I don't even know where <-0.3 fits in unless it's a typo.

Wed Feb 11, 2004 2:02 pm by Recusant

I tried that but it comes out absolutely tiny, mate. I don't know anything about qBasic my bro uses it, I just plugged that in and got a bunch of dashes and 'u' shapes at the top of the screen, which I guess is meant to be a graph of the function for values below -3?
To be honest I don't think Aod knew exactly what he was talking about when he posted.

Thu Feb 12, 2004 12:38 pm by Sh|ft

Might you be able to post a screenshot. My QBasic is temporarily "unavailable". If someone has it, can they send me QBasic v4.5 or whatever one makes executables outta the *.bas.

OT: BTW Recusant, congrats on your first full year @ TLR. I'm barely into my fourth month.

Edited by - [ZN-ShiftViper5 on 2/12/2004 12:44:15 PM

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