It is common for orchestras to have a brass section consisting of trombones/baritones, tubas, french horns and trumpets. Other than that trombones are commonly found in jazz bands and marching bands.
Take band in school.
trombone
the trombone
In an orchestra they are Trumpet Horn (Formally French Horn) Trombone Tuba In a Brass/Silver band Cornet Trombone Euphonium Tuba
Trombone are different for everyone so I recommend you go to a band shop and just try out their trombone and see what brand you like best.
Marching band or orchestra
Kellan played trombone in band.
Trombone
2nd position. Don't ever assume that all Trombones are in Bb, & there are lots of A's that can be played in other positions besides 2nd even on a Bb Trombone.
the claritromtars,the gutromnets
cornet Clarinet and Trombone
It depends entirely if you are a brass band trombonist in B flat, or an orchestral trombonist in C!! Brass band - if you play a C on your trombone, the same pitch is a Bflat on the piano - 3 semitones lower Orchestra - the trombone and the piano are in the same pitch. It all depends on which notes you call you're slide positions on the trombone