Well all of them would be ideal if you were playing a piece of music.
By moving the "slide"
By moving the "slide"
A slide...and their lips.
Use 2nd position and lots of air.
By extending the slide, you change the overall length of the horn and lower the note.
Yes. It prevents the slide from falling off the instrument when not in use.
No. The trigger enable you to hit #7 position without moving the slide. There is plenty of pro players who do not use a trigger trombone.
To play a trombone effectively, you need to have good breath control, proper embouchure (mouth position), and use the slide to change notes smoothly. Practice regularly to improve your tone quality, intonation, and technique.
They all change notes with the use of valves, while the trombone uses a slide.
A trombonist uses both the slide on the trombone and his mouth to control the notes.
The trombone is the only instrument in the brass section with no keys or valves. It only has a slide.
Marching Trombone> It looks like a large trumpet. It allows for easier marching , not having to use the slide.