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Maths help Please
Topic Started: Jun 7 2006, 06:05 AM (413 Views)
***musical princess***
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HOLY CARP!!!
I wish i could get my brain around what am trying to ask you.

What you have all described is exactly how i would have done it and in this situatuion, it makes no differnce which order you do it in.

But i know for a fact that there are graphs out there that the final solution is effected by the order you carry out the transformations. I can remember sitting in class and somone asking about it so i know for a fact that there are graphs like this! I just can't remeber which ones or which order it is. :(

x
x Caroline x
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John D'Oh
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MAMIL
***musical princess***
Jun 7 2006, 10:53 AM
I wish i could get my brain around what am trying to ask you.

What you have all described is exactly how i would have done it and in this situatuion, it makes no differnce which order you do it in.

But i know for a fact that there are graphs out there that the final solution is effected by the order you carry out the transformations. I can remember sitting in class and somone asking about it so i know for a fact that there are graphs like this! I just can't remeber which ones or which order it is. :(

x

The graph would be affected if you multiplied by 3 first, then took the sine, and then added thirty.

Alternatively, sin(2(x-30)) is not the same as sin(2x-30). Is that what you mean?
What do you mean "we", have you got a mouse in your pocket?
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Aqua Letifer
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ZOOOOOM!
Well maybe, but if you use calc to solve this problem, this issue with "which order" won't ever come up. I'm not sure if you know what I mean though, or even if that would be "allowed" by your teacher.
I cite irreconcilable differences.
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***musical princess***
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HOLY CARP!!!
John D'Oh
Jun 7 2006, 03:55 PM
***musical princess***
Jun 7 2006, 10:53 AM
I wish i could get my brain around what  am trying to ask you.

What you have all described is exactly how i would have done it and in this situatuion, it makes no differnce which order you do it in.

But i know for a fact that there are graphs out there that the final solution is effected by the order you carry out the transformations. I can remember sitting in class and somone asking about it so i know for a fact that there are graphs like this! I just can't remeber which ones or which order it is. :(

x

The graph would be affected if you multiplied by 3 first, then took the sine, and then added thirty.

Alternatively, sin(2(x-30)) is not the same as sin(2x-30). Is that what you mean?

Okay, i know i orginally referenced to a sine graph, but what i'm talking about is ALL graphs.

I know for a fact that when you do transformations, there is a set rder you do the movements in, i just can't for the life of me remember what the order is and it's too late to see my teacher. :(

x
x Caroline x
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kentcouncil
Fulla-Carp
For the general sine function

f(x) = a*sin(bx + c) + d

First b

Then c

Then a

Then d


This order holds true for functions other than sine as well.
It was a confusion of ideas between him and one of the lions he was hunting in Kenya that had caused A. B. Spottsworth to make the obituary column. He thought the lion was dead, and the lion thought it wasn't.

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***musical princess***
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HOLY CARP!!!
kentcouncil
Jun 7 2006, 04:06 PM
For the general sine function

f(x) = a*sin(bx + c) + d

First b

Then c

Then a

Then d


This order holds true for functions other than sine as well.

THANKYOU!!!

Half an hour later and i get what i'm looking for! I've been searching all over on line for a simple rule and this is what i was looking for.

I know this is what you guys were probably say but i was getting so confused. the order does make a difference.

x
x Caroline x
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***musical princess***
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HOLY CARP!!!
That bridge really is looking tempting... :(

x
x Caroline x
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John D'Oh
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MAMIL
***musical princess***
Jun 7 2006, 11:12 AM
kentcouncil
Jun 7 2006, 04:06 PM
For the general sine function

f(x) = a*sin(bx + c) + d

First b

Then c

Then a

Then d


This order holds true for functions other than sine as well.

THANKYOU!!!

Half an hour later and i get what i'm looking for! I've been searching all over on line for a simple rule and this is what i was looking for.

I know this is what you guys were probably say but i was getting so confused. the order does make a difference.

x

The way to remember it is that you always do what's in the brackets first, and that multpiplication/division always comes before addition/subtraction.
What do you mean "we", have you got a mouse in your pocket?
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JBryan
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I am the grey one
John D'Oh
Jun 7 2006, 09:53 AM
***musical princess***
Jun 7 2006, 10:40 AM
(Maths deserves to burn in hell!!!)

Bear in mind that the reason I'm trying to help, (other than my generous spirit, of course) is that this is more interesting than what I'm supposed to be doing by a factor somewhat larger than the one you're applying to your curve. Give you an idea of how great a career in engineering is? ;)

I am watching so, agreed.
"Any man who would make an X rated movie should be forced to take his daughter to see it". - John Wayne


There is a line we cross when we go from "I will believe it when I see it" to "I will see it when I believe it".


Henry II: I marvel at you after all these years. Still like a democratic drawbridge: going down for everybody.

Eleanor: At my age there's not much traffic anymore.

From The Lion in Winter.
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Axtremus
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HOLY CARP!!!
John D'Oh
Jun 7 2006, 11:21 AM
The way to remember it is that you always do what's in the brackets first, and that multpiplication/division always comes before addition/subtraction.

Now, see, none of this operator precedence business would have been an issue had we all use Reverse Polish Notation. :silly:
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