My brother is dexterous in playing trumpet is a brass instrument 
A trumpet seems like a difficult instrument to master.
wWLL IT INVOLVES CONSTANT PRACTICE,Trumpets are used in art music styles, for instance in orchestras, concert bands, and jazz ensembles.
I bet!  I really don't know a lot about the instrument or who may be famous for playing it.
They are played by blowing air through nearly-closed lips (called the player's embouchure), producing a "buzzing" sound 
Sounds difficult, what else?
about . Early trumpets did not provide means to change the length of tubing, whereas modern instruments generally have three (or sometimes four) valves in order to change their pitch. There are eight combinations of three valves, making seven different tubing lengths, with the third valve sometimes used as an alternate fingering equivalent to the 1–2 combination. Most trumpets have valves of the piston type, while some have the rotary type. The use of rotary-valved trumpets is more common in orchestral settings, although this practice varies by country
Trumpet
A trumpet is a brass instrument commonly used in classical and jazz ensembles. The trumpet group contains the instruments (such as the piccolo trumpet) with the highest register in the brass family. Trumpet-like instruments have historically been used as signaling devices in battle or hunting, with examples dating back to at least 1500 BC; they began to be used as musical instruments only in the late 14th or early 15th century. Trumpets are used in art music styles, for instance in orchestras, concert bands, and