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Geek Culture / MATH is bugging me....HELP!

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JoelJ
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Posted: 21st Jan 2005 07:29
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http://darwin.dbspot.com/crap.PNG

find what aY would be for me in the form of an equation.
i've been trying loads of differnt things


ps: i'm attempting to write meself a point function like the one in DBP

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Neofish
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Posted: 21st Jan 2005 07:59 Edited at: 21st Jan 2005 07:59
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Trig:

Adjacent and Opposite angles = tan

ay = tan-1 ( (C-Z) / (A-X) )

tan-1 is inverse tan if you didn't go

that help?


EDIT you got teh eqaution right, but you needed to perform inverse tan on it

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Benjamin
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Posted: 21st Jan 2005 08:19
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I really wish I understood what you were talking about

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Spaceman Spiff
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Posted: 21st Jan 2005 08:27
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Hmmm... Looks kinda like the stuff my hs-math teacher is trying to pound into my head. I'm to smart for her though. (meaning, I can't figure any of it out) Give me about three months and I'll have it down pat and can help ya then.

I've bein driving since the age of three; if you don't belive me ask my parents, you can find them at the county hospital for the mentally imbalanced.
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Neofish
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Posted: 21st Jan 2005 08:29 Edited at: 21st Jan 2005 08:29
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if you get the tangent on an angle called theta (there's a symbol for it) it is equal to the opposite side of the triangle (C-Z in this case) divided by the adjacent side that is not the longest side (hypotemuse), which is A-X in this case. This gives us:

tan theta = opp / adj
OR
theta = tan-1 opp/adj
OR
opp = adj * tan theta
OR
adj = obj / tan theta


There are also sin (which is opp and hyp) and cos (adj and hyp).

The way of remembering it is this:
 O    A    O
S H  C H T A
(soh cah toa)


Understand any more?

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Dave J
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Posted: 21st Jan 2005 08:31 Edited at: 21st Jan 2005 08:32
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Yup, the fish is right. However, you actually got the equation the wrong way around, observe:

Tan0 = Opp / Adj
Tan(aY) = (C-Z)/(A-X)
aY = Tan-1((C-Z)/(A-X))

You started off with the wrong formula, don't you know SOH CAH TOA?


Edit: Damn, the fish beat me again.


"Computers are useless, they can only give you answers."
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Neofish
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Posted: 21st Jan 2005 08:36
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Mua ha ha ha; I'll do one better and write it properly:


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Dave J
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Posted: 21st Jan 2005 08:41
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I've never learned that format of writing it...


"Computers are useless, they can only give you answers."
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Neofish
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Posted: 21st Jan 2005 09:05
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It's so you can remember the O is over A bits with less effort like s=d/t has a little triangle

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Peter H
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Posted: 21st Jan 2005 10:28 Edited at: 21st Jan 2005 10:34
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too bad you guys beat me to it

Quote: "ps: i'm attempting to write meself a point function like the one in DBP"

the "teh codez"(DBPro) style of this operation would be


Quote: "soh cah toa"

i always remembered it as "Oscar had a hold on Arthur" (which only remember's "oh ah oa" but since the trig functions are usually listed in "sin cos tan" order it doesn't matter)

Quote: "hypotemuse"

wow

"We make the worst games in the universe."

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David T
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Posted: 21st Jan 2005 16:58
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Quote: "hypotemuse"


Hypoteneuse even?

Get 15 new commands, all the date / time commands left out of DBPro for free!
DOWNLOAD PLUGINS HERE: http://www.davidtattersall.me.uk/ and select "DarkBasic"
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Robin
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Posted: 21st Jan 2005 18:52 Edited at: 21st Jan 2005 18:52
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Quote: "i always remembered it as "Oscar had a hold on Arthur" (which only remember's "oh ah oa" but since the trig functions are usually listed in "sin cos tan" order it doesn't matter)"


My maths teacher taught it as 'sex on holiday can affect health to old age' (take the first letters and arrange in triangles)

http://www.thegameszone.tk | robin@thegameszone.tk

Don't waste paper. It's not like it grows on trees.
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Benjamin
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Posted: 21st Jan 2005 20:53
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Quote: "ps: i'm attempting to write meself a point function like the one in DBP"

A point function? The one that returns the value of a pixel?

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Neofish
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Posted: 22nd Jan 2005 01:14
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Quote: "wow"

Quote: "Hypoteneuse even?"

Did I ever claim to be able to spell

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Benjamin
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Posted: 22nd Jan 2005 01:25
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Quote: "Hypoteneuse even?"

Hate to brake it to you, smartass, but Hypoteneuse isn't the correct spelling either, its hypotenuse.

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Neofish
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Posted: 22nd Jan 2005 01:26
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lol, I just write hyp and assum,e they can read that

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JoelJ
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Posted: 22nd Jan 2005 06:20
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Quote: "
EDIT you got teh eqaution right, but you needed to perform inverse tan on it "


awesome, i knew that i had to inverse, i've tried TAN^-1 stuff like that, i was lost thanks a ton

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Ilya
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Posted: 22nd Jan 2005 07:45
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I'm confused.

Anyway, what does the hyp button on my calculator do?

And why do they have cos if there's sin?

Quote: "I've seen the word programming and I'm not sure what it means. Anybody please explain?"


Quote: "We shouldn't sacrifice the truth to preserve "balance"."
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Neofish
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Posted: 22nd Jan 2005 19:32
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thats a different type of hyp, i've never used it but it says htan when I press hyp then tan

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Los
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Posted: 22nd Jan 2005 23:37
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Sorry Old Hedgehog, Car 'As Hurt, The Other Ass.

the car hits one of the hedgehogs bum cheeks..

no no no no no no no no
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Dom
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Posted: 24th Jan 2005 00:27
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SOH CAH TOA


Thanks to Animeblood for the Logo!
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Coding Fodder
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Posted: 24th Jan 2005 11:35
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The hyp on your calculator gives access to the hyperbolic trig functions. You can go your whole life without needing those. If you are not a mathematician or engineer that is.

Something really catchy that makes people stop and think about the meaning of life and say to themselves "My but thats clever"
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Frozen Flame
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Posted: 24th Jan 2005 11:51
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Some Old Hippie Came Around Here Tripping On Acid
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