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

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student1988
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1352848428519:dw

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

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

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

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

student1988
 2 years ago
Best ResponseYou've already chosen the best response.0but i wasn't sure if it was right because the complex number i disappeared!

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

asnaseer
 2 years ago
Best ResponseYou've already chosen the best response.1your 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 :)

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

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

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

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

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

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