Re: open parenthesis and reduce an expression

*To*: mathgroup at smc.vnet.net*Subject*: [mg75148] Re: open parenthesis and reduce an expression*From*: dimitris <dimmechan at yahoo.com>*Date*: Wed, 18 Apr 2007 05:08:31 -0400 (EDT)*References*: <f01507$9gp$1@smc.vnet.net>

Are you sure about your expression? =CF/=C7 kem =DD=E3=F1=E1=F8=E5: > Hi, How can I reduce the following formula for instance > (Cos[b[x,y]] zx[x,y]-Sin[b[x,y]] zy[x,y]) (zxx Cos[b[x,y]]+zyx > Cos[b[x,y]]+ > zxx Sin[b[x,y]]-zyx Sin[b[x,y]]+bx (Cos[b[x,y]]-Sin[b[x,y]]) > zx[x,y]- > bx (Cos[b[x,y]]+Sin[b[x,y]]) zy[x,y]) > > to the formula > zxx zx + zyx zx > in mathematica? > > I know that such a reduction is possible since I did it manually, I > just need to test it on more complex expressions. > > Thank you very much > > kem