Eph 4:26 Be ye angry, and sin not: let not the sun go down upon your wrath:
Eph 4:27 Neither give place to the devil.
Its not a sin to get angry its what we do with that anger that gets us into trouble. Just give it to God. He will fight your battles for you and don’t give that old devil one ounce of credit or attention just tell him to get behind you.