December 21st, 2016, 01:40 PM  #1 
Newbie Joined: Dec 2016 From: HK Posts: 8 Thanks: 0  Help with complex number how come e^i*pi*10/3 and e^i*pi*5/3 can change to ( 0.5 + i*root3/2) and (0.5 + i*root 3/2) 
December 21st, 2016, 02:08 PM  #2 
Senior Member Joined: Sep 2007 From: USA Posts: 346 Thanks: 64 Math Focus: Calculus 
That's because $e^{i\theta}=\cos(\theta)+i\,\sin(\theta)$.


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