Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2013

[Date Index] [Thread Index] [Author Index]

Search the Archive

ComplexExpand off by a factor of (-1)?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg129882] ComplexExpand off by a factor of (-1)?
  • From: charles.ces at gmail.com
  • Date: Fri, 22 Feb 2013 01:05:24 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • Delivered-to: l-mathgroup@wolfram.com
  • Delivered-to: mathgroup-newout@smc.vnet.net
  • Delivered-to: mathgroup-newsend@smc.vnet.net

Would someone be able to help me understand why when I enter the expression:

ComplexExpand[(E^(I*y) - E^(-I*y))/2*I] I get a result of -Sin[y] instead of Sin[y]?

Thanks.

Charles S.



  • Prev by Date: Re: Is there a way to integrate and differentiate Erfi?
  • Next by Date: barchart
  • Previous by thread: Re: Is there a way to integrate and differentiate Erfi?
  • Next by thread: Re: ComplexExpand off by a factor of (-1)?