brass I think I could be wrong though
The trombone is part of the brass section.
Horn, Trumpet, Trombone, and tuba.
In an orchestra, you can typically find instruments such as strings (violin, cello), woodwinds (flute, clarinet), brass (trumpet, trombone), and percussion (drums, timpani).
Most of the time, an orchestra has three trombones, where it's two tenors and a bass.
Marching band or orchestra
In an orchestra they are Trumpet Horn (Formally French Horn) Trombone Tuba In a Brass/Silver band Cornet Trombone Euphonium Tuba
In a symphony orchestra in the brass section there are usually 3 trombones in proportion with 4 horns, 2 trumpets and a bass instrument. ref The Oxford Companion to Music, orchestra, page 898.Most of the time, an orchestra uses three trombones, with two tenors and one bass.
Trumpet, Trombone, Tuba, French Horn
Instruments typically found in an orchestra include strings (violin, viola, cello, double bass), woodwinds (flute, clarinet, oboe, bassoon), brass (trumpet, trombone, French horn, tuba), and percussion (drums, timpani, xylophone).
trumpet, trombone, baritone, tuba, and french horn
Trumpet, Trombone, Tuba, French Horn
F horn, trumpet, trombone, and tuba.