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Math help pls

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cbj
Posts: 2114 - Karma: 1,136
So the position of a simple harmonic oscillator is given by Acos(wt+phi) or Ee^(-i(wt+phi)) where A and E are constants and w is omega. Can someone tell me how the shit you can raise the natural number to negetive i times wt+phi and end up with a completely real solution?
Jan 28 2013 4:57PM
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RimJobber
Posts: 3313 - Karma: 10,058
Yes.
Jan 28 2013 4:58PM
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WPoch
Posts: 1751 - Karma: 3,831
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What is this i dont even
Jan 28 2013 4:59PM
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cbj
Posts: 2114 - Karma: 1,136
Impossibruuuuuu
Jan 28 2013 5:00PM
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WPoch
Posts: 1751 - Karma: 3,831
You actually answered his question...
Jan 28 2013 5:01PM
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Hammyslapwagon
Posts: 1261 - Karma: 1,409
42
Jan 28 2013 5:03PM
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RimJobber
Posts: 3313 - Karma: 10,058
No. It's 56.3
Jan 28 2013 5:04PM
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FatWhore
Posts: 2213 - Karma: 1,098
34.52567
Jan 28 2013 5:05PM
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RimJobber
Posts: 3313 - Karma: 10,058
Trust me. I'm an engineer
Jan 28 2013 5:05PM
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vandersteeze
Posts: 2650 - Karma: 1,511
use eulers identity

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Jan 28 2013 5:19PM
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vandersteeze
Posts: 2650 - Karma: 1,511
with x = wt+phi
Jan 28 2013 5:20PM
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cbj
Posts: 2114 - Karma: 1,136
I get that much, where it comes from but where does the i*sin(x) go?
Jan 28 2013 5:32PM
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whoa-dere
Posts: 10596 - Karma: 7,100
your username stands for cunt blowjob
Jan 28 2013 5:42PM
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chicken
Posts: 6843 - Karma: 2,122
both the real and imaginary parts of the complex number must satisfy the differential equation on their own.
Jan 28 2013 5:48PM
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chicken
Posts: 6843 - Karma: 2,122
actually I have an old book that explains it well and quite concisely. I'll post it here for you
Jan 28 2013 5:50PM
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Steve-Brown
Posts: 1894 - Karma: 810
what math class is this....shit....

Jan 28 2013 5:53PM
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spliff.Life
Posts: 7847 - Karma: 1,549
i havent taken math for several years, but from whats been posted, would you set your first natural number to i power to isinx+cos x and theyll either square or cancel
Jan 28 2013 5:58PM
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chicken
Posts: 6843 - Karma: 2,122
you might just need the last page but I included the whole section just in case.

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Jan 28 2013 6:16PM
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Mitchell.
Posts: 1650 - Karma: 630
dont understand this shit but +K for going out of your way to help
Jan 28 2013 6:17PM
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cbj
Posts: 2114 - Karma: 1,136
That actually makes sense. So the real and imaginary parts are handled as separate solutions... Much better than having a complex solution with real and imaginary parts.
Jan 30 2013 8:03PM
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Darth.Maul
Posts: 2472 - Karma: 652
Don't you just love math!? I sort of miss Calculus, Stats isn't very mathy so far :(

All math nerds UNITEEEEE!!!
Jan 30 2013 9:28PM
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SFB
Posts: 8895 - Karma: 26,347
the answer would be -223oi423i4uy3234873849ryoiesufhbkjlsdnvdfgjdffsadf3wor8ewruiwr934 to the tenth power.
Jan 30 2013 9:33PM
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Krokodile
Posts: 350 - Karma: 40
I just took Calc 4 and an Electrical Engineering class where I learned this shit.

And I remember none of it.

Sorry.
Jan 30 2013 9:36PM
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chicken
Posts: 6843 - Karma: 2,122
just out of curiosity, what is calc 4?

I've never heard of it before. Is it what you call introductory ODE's?
Jan 31 2013 5:31PM
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Wallisch_pl
Posts: 5260 - Karma: 1,022
lost
Jan 31 2013 5:34PM
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Krokodile
Posts: 350 - Karma: 40
Yeah, at my school its full name is Calculus 4: Elementary Differential Equations, and it's the highest level math most technical majors have to take.  The next level splits into things like partial differential equations, real, complex, and numerical analysis, discrete math, and some others I can't remember.
Feb 1 2013 10:02AM
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act.resist
Posts: 8875 - Karma: 513
cum bitch junk
Feb 1 2013 10:30AM
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sober_sadface
Posts: 27 - Karma: 21
da lolz

Feb 1 2013 10:50AM
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Fluttershy
Posts: 586 - Karma: 763
Did you try setting it to wumbo?
Feb 1 2013 12:40PM
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act.resist
Posts: 8875 - Karma: 513
I wumbo, you wumbo, he, she, me wumbo. WUMBO. wumboing. we'll have three wumbo. wumborama. wumbology. the STUDY of WUMBO? It's first grade
Feb 1 2013 12:52PM
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cbj
Posts: 2114 - Karma: 1,136
Patrick
Feb 1 2013 12:53PM
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