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

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student1988 Group TitleBest ResponseYou've already chosen the best response.0
dw:1352848428519:dw
 2 years 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? :)
 2 years ago

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

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

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

student1988 Group TitleBest ResponseYou've already chosen the best response.0
Not sure what you mean by that
 2 years 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 :)
 2 years ago

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

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

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

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

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

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

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