Drexel dragonThe Math ForumDonate to the Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.

Math Forum » Discussions » Software » comp.soft-sys.math.mathematica

Topic: ComplexExpand off by a factor of (-1)?
Replies: 3   Last Post: Feb 23, 2013 7:01 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Raul Martinez

Posts: 11
Registered: 5/14/07
Re: ComplexExpand off by a factor of (-1)?
Posted: Feb 23, 2013 7:01 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

The reason is that the denominator should be (2*I) instead of 2*I. As it stands, the expression (E^(I*y) - E^(-I*y))/2*I is interpreted as I*(E^(I*y) - E^(-I*y))/2.


On Feb 21, 2013, at 10:05 PM, charles.ces@gmail.com wrote:

> 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.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum 1994-2015. All Rights Reserved.