Do all tenor trombones have triggers?

No, not all tenor trombones have triggers. While many professional-level tenor trombones are equipped with triggers, some student and intermediate models may not have them. Triggers are additional mechanisms on the instrument that allow the player to instantly change the slide position, making certain notes and passages easier to play. The presence or absence of triggers depends on the trombone's design and features and is not a defining characteristic of all tenor trombones.