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September 24th, 2013, 04:41 AM   #1
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Rectangular Form

Hi, does anyone know how to write in rectagular form?
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September 24th, 2013, 04:53 AM   #2
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Re: Rectangular Form

You need to use Euler's formula:

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September 24th, 2013, 05:08 AM   #3
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Re: Rectangular Form

so if I write it



I have



but then I am lost there is that already rectangular form? I think it is bc the real part (cosine) is not in terms of z.
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September 24th, 2013, 07:23 AM   #4
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Re: Rectangular Form

Do you not know what "rectangular form" means? You have a+ bi with and . I don't know what you mean by "the real part (cosine) is not in terms of z". There is no "z" in anything you write.
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September 24th, 2013, 07:40 AM   #5
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Re: Rectangular Form

Hey, I'm sorry if that is a stupid question. This is my first exposure to complex variables. I do not have a firm footing yet.

In class the professor said to beware was not in rectangular form. That's what I meant. He said cos is the real part and sin is the real part.
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September 24th, 2013, 08:41 AM   #6
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Re: Rectangular Form

Quote:
Originally Posted by aaron-math

In class the professor said to beware was not in rectangular form. That's what I meant. He said cos is the real part and sin is the real part.
He may have meant that you are still expected to simplify the cos and sin, if you can. In this case:



So, you can simpify your answer and get rid of the sin and cosine functions.
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