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Re: ComplexExpand off by a factor of (-1)?


On Friday, February 22, 2013 7:05:36 AM UTC+1, charl... at gmail.com wrote:
> 
> ComplexExpand[(E^(I*y) - E^(-I*y))/2*I] I get a result of -Sin[y] instead of Sin[y]?


If you expect Sin[y] as answer, you probably meant /(2*I) in stead of /2 *I



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