That really helped tremenduously. I'd never have found the allvalue command by myself. Don Ritchie

I suspect that solve is working o.k., but I'm just not up to speed on Maple's input/output rules and formats. I uploaded a file where solve gives an empty blank answer: http://maplenet.maplesoft.com/maplenet/worksheet/mapleprimes/2510_CDR_simeq_test.mw

I suspect that solve is working o.k., but I'm just not up to speed on Maple's input/output rules and formats. I uploaded a file where solve gives an empty blank answer: http://maplenet.maplesoft.com/maplenet/worksheet/mapleprimes/2510_CDR_simeq_test.mw

O.K., I can see the a=RootOf(...) part of that, but how do I translate the theta= part? Also, if I try solve({eq1,eq2},[a,tan(theta)]); Maple (Windows version) just returns an empty bracket. I'm relatively new to Maple and am using V10.05. The output appearing to be based on elimination of x was obtained when I used solve({eq1,eq2}). Sorry about that.

O.K., I can see the a=RootOf(...) part of that, but how do I translate the theta= part? Also, if I try solve({eq1,eq2},[a,tan(theta)]); Maple (Windows version) just returns an empty bracket. I'm relatively new to Maple and am using V10.05. The output appearing to be based on elimination of x was obtained when I used solve({eq1,eq2}). Sorry about that.