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November 01, 2025, 03:34:54 pm
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Author Topic: complex  (Read 1737 times)  Share 

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fredrick

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complex
« on: October 01, 2008, 05:49:56 pm »
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find all solutions to the equation .

i found the solutions if polar form but the answer and working out is in cartesian form which is messy, can we have the solutions in any form?
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ell

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Re: complex
« Reply #1 on: October 01, 2008, 05:57:21 pm »
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Depends what the question specifies I guess. If it just asks to express your answers in Cartesian I don't see why you wouldn't be able to use De Moivre's theorem then just convert to Cartesian.
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Mao

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Re: complex
« Reply #2 on: October 01, 2008, 06:10:37 pm »
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why would it be messy? they're pi/3 away from each other

« Last Edit: October 01, 2008, 06:12:45 pm by Mao »
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Collin Li

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Re: complex
« Reply #3 on: October 01, 2008, 06:11:19 pm »
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Yeah - just convert your polar form solutions to cartesian form. Binomial expansion to degree 6 is a waste of time.
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fredrick

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Re: complex
« Reply #4 on: October 01, 2008, 06:21:00 pm »
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so i must have the solutions in cartesian form, but in this question it didnt specify a form.
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shinny

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Re: complex
« Reply #5 on: October 01, 2008, 06:23:47 pm »
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Quote from: fredrick on October 01, 2008, 06:21:00 pm
so i must have the solutions in cartesian form, but in this question it didnt specify a form.

Huh...this is going in circles @.@ If it doesn't specify a particular form, then either's fine...
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Pandemonium

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Re: complex
« Reply #6 on: October 01, 2008, 06:44:17 pm »
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apparently you should put it back into the form that it was first asked for anyway.
but since it's an exam just do that for the ones that matter.
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