If trust could be established then I'm sure there would be a sharing of information related to Science and Math. Inventions and discoveries would be compared and there might be some fear and panic as well. Religious leaders would have some explaining to do to their congregations.
Well, we would have to be open-minded, because it is expected that the life forms there would be totally different from us. We would also have to look for ways to live harmoniously with each other and develop good relationships with them.