Re: ComplexExpand off by a factor of (-1)?
- To: mathgroup at smc.vnet.net
- Subject: [mg129894] Re: ComplexExpand off by a factor of (-1)?
- From: Raul Martinez <raulmart at mac.com>
- Date: Sat, 23 Feb 2013 07:03:06 -0500 (EST)
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- References: <20130222060524.703B768D0@smc.vnet.net>
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. Raul On Feb 21, 2013, at 10:05 PM, charles.ces at 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. >
- References:
- ComplexExpand off by a factor of (-1)?
- From: charles.ces@gmail.com
- ComplexExpand off by a factor of (-1)?