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PostPosted: Sun, 20 May 2012 19:31:47 UTC 
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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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PostPosted: Sun, 20 May 2012 21:33:11 UTC 
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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 re^{i\theta}

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