How many players are generally necessary to perform a trio sonata?

3 players are needed
A trio sonata is written for two solo melodic instruments and basso continuo,

A trio is 3. {A solo is 1, duo is 2, a quartet is 4, a quintet is 5, etc.)

Contemporary jazz is sometimes called smooth jazz

The theme of social protest remained a consistent focus for jacob lawrence throughout his career. in the 1960s lawrence was inspired by news reports and photographs, including images of segregated lunch counter sit-ins and stories of the   freedom riders in the civil rights movement. from the 1970s onward, lawrence's work focused less explicitly on contemporary social issues.