Re: Mathmatica Problem...

*To*: mathgroup at smc.vnet.net*Subject*: [mg14348] Re: [mg14320] Mathmatica Problem...*From*: BobHanlon at aol.com*Date*: Thu, 15 Oct 1998 00:28:51 -0400*Sender*: owner-wri-mathgroup at wolfram.com

David, TrigReduce[Cos[x]^3 Sin[x]^2] 1/16*(2*Cos[x] - Cos[3*x] - Cos[5*x]) % // Simplify Cos[x]^3*Sin[x]^2 Bob Hanlon In a message dated 10/13/98 3:59:28 AM, d.j.winstanley at ic.ac.uk wrote: >We have just upgraded to release 3 of mathematica and we have found a >problem with the Expand function as described in the mathematica >manual. Here is the mathematica 3.0 output... > > >In[3]:= Expand[Cos[x]^3 Sin[x]^2,Trig->True] > >gives > > 3 2 >Out[3]= Cos[x] Sin[x] > > >this is not the answer given in the manual, which is... > > Cos[x] - Cos[3 x] - Cos[5 x] > ------ -------- -------- > 8 16 16 > > >We were led to believe that the new version was compatible with the >previous version. > >Is there a switch to obtain compatibility???