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Forum » General Discussions » Anything Goes » Any of you math types?
Any of you math types?
HaydenJohnsDate: Friday, 2009-03-06, 10:20 AM | Message # 1
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I stumbled across this on wikipedia, and can't figure out how it works because it's beyond what I've experienced in maths (I'm only in year 11)

e^(pi*i)=-1

What? How do two irrational numbers and a non-real number become a rational, real number?

oh, and use google calculator if you want proof. I tried to link but it didn't work


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Message edited by HaydenJohns - Friday, 2009-03-06, 10:28 AM
 
Sk8a_801Date: Saturday, 2009-03-07, 1:02 AM | Message # 2
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Um, i don't know i'll ask my mum when i go home lol, she's a math teacher, she'll have the answer for sure lol... :P

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Those Who Do.
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TeekDate: Sunday, 2009-03-08, 11:58 AM | Message # 3
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i have no idea. i dont even know what a irrational number means let alone what a non-real number is...
lol

im not doing maths this year. yay biggrin


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HaydenJohnsDate: Monday, 2009-03-09, 9:23 AM | Message # 4
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Ahh, well. I suppose it may become clearer after doing calculus.

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ChristosDate: Tuesday, 2009-03-10, 6:48 AM | Message # 5
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whats math?

lol

 
StriderDate: Tuesday, 2009-03-10, 9:25 AM | Message # 6
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Bah what kind of silly question is that everyone know that e^(pi*i) + 1 = 0 its called Euler's identity

ok

e^(i*x) = cos x + i*sin x

e^(i *pi) = cos pi + i*sin pi.

since
cos pi = -1
and
sin pi = 0

e^(i *pi) = -1
e^(i \pi) +1 = 0

There we go, now for the source because I had never seen that equation before http://en.wikipedia.org/wiki/Euler%27s_identity

I was pretty damn amazed as well, did you see it in this article? anyways I think I might do some homework because that's what I'm meant to be doing :P

 
Sk8a_801Date: Tuesday, 2009-03-10, 10:50 AM | Message # 7
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hahah, my mum knew, but she said it in thins really complicated way i had no idea wat she was on about.

There Are 10 Types Of People Who Understand Binary
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Those Who Don't.
 
HaydenJohnsDate: Tuesday, 2009-03-10, 12:34 PM | Message # 8
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Ahh, thankyou.

I had another look at the article (looked over it before) and it makes a tad more sense now smile

I guess this is what happens when I only have just over a year 10 math education. I'll probably slap myself in two years time and say "YOU IDIOT!"


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ChristosDate: Wednesday, 2009-03-11, 1:25 AM | Message # 9
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im grade 1 and i owned that question! i didnt tell u all cause im so leet lol
 
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