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  #41  
Old 06-19-2006, 11:10 AM
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Kazodev Kazodev is offline
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Quote:
Originally Posted by Westley
Is it embarassing as a supposed "math geek" if I tell you that I don't see how that equation is true? Can you explain at a level appropriate for somebody who only got a BS, and it was many years ago?

I have no idea how to use an imaginary exponent.
This is Euler's formula that says e^(i*theta) = cos(theta) + i*sin(theta) so since theta = pi, then e^(i*pi) = cos(pi) + i*sin(pi) = -1 + i*0 = -1
Edited to say theta = pi, sorry for the confusion, yes i = sqrt(-1) i.e. we choose the "positive branch of sqrt()"...I hope I worded that correctly. Don't want the math phds jumping on for this one

Last edited by Kazodev; 06-19-2006 at 11:34 AM..
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  #42  
Old 06-19-2006, 11:16 AM
Westley Westley is offline
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Thanks!
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  #43  
Old 06-19-2006, 11:26 AM
Uncle Carl Uncle Carl is offline
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Quote:
so since i = pi
I don't really care about the answer and I'm not sure why I'm asking, but I thought i = -sqrt(1)?
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  #44  
Old 06-19-2006, 11:27 AM
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Quote:
Originally Posted by Uncle Carl
I don't really care about the answer and I'm not sure why I'm asking, but I thought i = -sqrt(1)?
He meant theta = pi.
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  #45  
Old 06-19-2006, 11:28 AM
Uncle Carl Uncle Carl is offline
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Is the thing I put about i right?
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  #46  
Old 06-19-2006, 11:28 AM
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Quote:
Originally Posted by Uncle Carl
Is the thing I put about i right?
No.
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  #47  
Old 06-19-2006, 11:30 AM
Uncle Carl Uncle Carl is offline
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Dang.
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  #48  
Old 06-19-2006, 11:30 AM
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Quote:
Originally Posted by Uncle Carl
I don't really care about the answer and I'm not sure why I'm asking, but I thought i = -sqrt(1)?
what you wrote is -1.

IIRC, i = sqrt(-1)
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  #49  
Old 06-19-2006, 11:31 AM
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Quote:
Originally Posted by Judge Dredd
what you wrote is -1.

IIRC, i = sqrt(-1)
You giant doofus, he was clearly pulling our collective leg.
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  #50  
Old 06-19-2006, 11:33 AM
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Quote:
Originally Posted by Uncle Carl
I don't really care about the answer and I'm not sure why I'm asking, but I thought i = -sqrt(1)?
you've got the squirts? man, keep that to yourself!
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