4.9.319.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35958 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
support TrigCombine[sin(x)+cos(x),sin(x)]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35959 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e