How has the trombone evolved over the years in its structure and use?

The Trombone has evolved significantly since its inception in the 15th century, originally appearing as a simple slide instrument called the "sackbut." Over the centuries, it saw improvements in materials and construction, including the introduction of brass and more precise manufacturing techniques. The instrument's range has expanded with the development of valves in the 19th century, leading to the creation of various types like the bass and tenor trombone. Its use has also diversified, transitioning from primarily orchestral and church music to a prominent role in jazz, pop, and contemporary genres.