Re: Simplify

*To*: mathgroup at smc.vnet.net*Subject*: [mg127674] Re: Simplify*From*: David Bailey <dave at removedbailey.co.uk>*Date*: Tue, 14 Aug 2012 04:23:42 -0400 (EDT)*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*References*: <k0a9r3$hgh$1@smc.vnet.net>

On 13/08/2012 08:20, news wrote: > Hi folks, > > Simplify must result: > > Simplify[(1 + Sin[x] - Cos[x])/(1 + Sin[x] + Cos[x]) == Tan[x/2]] > True > > but why instead it results: > > Simplify[(1 + Sin[x] - Cos[x]) / (1 + Sin[x] + Cox[x]) == Tan[x/2]] > > ((Cos[x] - Cox[x])*Tan[x/2]) / (1 + Cox[x] + Sin[x]) == 0 > > Thanks. > > Max. > Probably because you wrote Cox instead of Cos!!! The syntax colouring could have solved that problem. Notice how when you fix the mistake, the function name turns from blue to black (assuming default settings). David Bailey http://www.dbaileyconsultancy.co.uk