"...but, as he was ambitious, I slew him. There is tears for his love; joy for his fortune; honour for his valour; and death for his ambition." This represent ethos because Brutus' it is appealing to the spirit and culture of the Roman people.
"If there be any in this assembly, any dear friend of Caesar's, to him I say, that Brutus' love to Caesar was no less than his" This represents pathos because Brutus is evoking emotion in the citizens.
"Not that I loved Caesar less, but that I loved Rome more. Had you rather Caesar were living and die all slaves, than that Caesar were dead, to live all free men?" This represents logos because he is giving the townspeople his reasoning as to why he killed Caesar.