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 Post subject: Answers in the form a + bj (a, b are real)Posted: Sun, 20 May 2012 19:31:47 UTC
 S.O.S. Newbie

Joined: Wed, 7 Apr 2010 10:59:47 UTC
Posts: 2
Hi,
I was wondering if someone could point me in the right direction with this problem.

Simplify by hand and show working, answers in the form a + bj (a, b are real).

(4cos pi/9 + 4jsin pi/9)^3

Any help would be appreciated.

Thanks.

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 Post subject: Re: Answers in the form a + bj (a, b are real)Posted: Sun, 20 May 2012 21:33:11 UTC
 Moderator

Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12098
Location: Austin, TX
harley wrote:
Hi,
I was wondering if someone could point me in the right direction with this problem.

Simplify by hand and show working, answers in the form a + bj (a, b are real).

(4cos pi/9 + 4jsin pi/9)^3

Any help would be appreciated.

Thanks.

Write your number in polar form

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