1. Transpose the notes. The trombone is pitched in B-flat, so you will need to transpose the piano notes up by one whole tone to play them on the trombone. This can be done by simply moving all of the notes up one step on the staff.
2. Adjust the articulation. The trombone is a brass instrument, so it produces a different sound than the piano. You will need to adjust the articulation of the notes to make them sound more trombone-like. This can be done by adding slurs, tonguing, and vibrato.
3. Add dynamics. The piano has a wide range of dynamics, from very soft to very loud. The trombone also has a wide range of dynamics, but it is not as expressive as the piano. You will need to add dynamics to the notes to make them sound more musical. This can be done by varying the volume and intensity of the notes.
With a little practice, you will be able to convert piano notes to trombone notes with ease.