The Solve command output is sorted, might not be working on some exceptional cases.
Works fine on rational numbers, trigonometric expressions.
Solve[cos(x)*tan(x)] now yields the correct solution.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23677 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
trigrules are erroneous. 

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23678 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
tidying

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23679 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
The output of the Solve command are sorted.
Changed the tests accordingly.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23680 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e