Unless the court orders otherwise, an expert may state an opinion-and give the reasons for it-without first testifying to the underlying facts or data. But the expert may be required to disclose those facts or data on cross-examination.
Utah. R. Evid. 705
Advisory Committee Note. The language of this rule has been amended as part of the restyling of the Evidence Rules to make them more easily understood and to make style and terminology consistent throughout the rules. These changes are intended to be stylistic only. There is no intent to change any result in any ruling on evidence admissibility. This rule is the federal rule, verbatim.