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student1988
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Write the expression in the standard form a + bi.
(View my question to see it written, sorry for the inconvenience)
 one year ago
 one year ago
student1988 Group Title
Write the expression in the standard form a + bi. (View my question to see it written, sorry for the inconvenience)
 one year ago
 one year ago

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student1988 Group TitleBest ResponseYou've already chosen the best response.0
dw:1352848428519:dw
 one year ago

student1988 Group TitleBest ResponseYou've already chosen the best response.0
That's raised to the fourth power.. I got 4. Can someone tell me if i am correct? :)
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
how did you arrive at your answer?
 one year ago

student1988 Group TitleBest ResponseYou've already chosen the best response.0
Is it wrong? i used De Moivre's Theorem
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
so did you first convert it to the form \(e^{i\theta}\)?
 one year ago

student1988 Group TitleBest ResponseYou've already chosen the best response.0
but i wasn't sure if it was right because the complex number i disappeared!
 one year ago

student1988 Group TitleBest ResponseYou've already chosen the best response.0
Not sure what you mean by that
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
your answer is correct  I am just making sure you used this way of getting to the answer rather than trying to expand the braces with the fourth power :)
 one year ago

student1988 Group TitleBest ResponseYou've already chosen the best response.0
dw:1352848854469:dw
 one year ago

student1988 Group TitleBest ResponseYou've already chosen the best response.0
i used this form
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
the method I used was to first convert it as follows:\[(\sqrt{2}(\cos(3\pi/4)+i\sin(3\pi/4))^4=(\sqrt{2}e^{i3\pi/4})^4\]
 one year ago

student1988 Group TitleBest ResponseYou've already chosen the best response.0
oh, i haven't seen this form. Could you tell me where I can read on this form?
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
it uses the identity:\[e^{i\theta}=\cos(\theta)+i\sin(\theta)\]
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
See here: http://en.wikipedia.org/wiki/Euler%27s_identity
 one year ago

student1988 Group TitleBest ResponseYou've already chosen the best response.0
Euler's Formula. Thanks, i'll read it! Thank you! :)
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
Sorry  wrong link, I meant this one: http://en.wikipedia.org/wiki/Euler%27s_formula
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
yup  you got it!
 one year ago
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