"believe me for mine honour, and have respect to mine honour, that you may believe" (3.2.61).
"Had you rather Caesar were living and die all slaves, than that Caesar were dead, to live all free men?" (3.2.61).
"There is tears for his love; joy for his fortune; honour for his valour; and death for his ambition." (3.2.61).
Ethos is represented because Brutus is making himself seem honorable to ensure the Roman people will agree with his actions. It makes the Romans respect his words.
Pathos is being used because Brutus is making the Romans feel fearful of what would have happened if Caesar reached the top of the ladder and achieved power. It makes the Roman's believe Brutus did the right thing.
Logos is being shown because Brutus says that he killed Caesar, which is a truth that can't be denied. He made the Romans understand that he killed Caesar for his ambition and to make Rome better.