When yours boss is angry or upset, it is certainly hard to communicate, particularly if you are at fault. Nevertheless, this is the time when talking is most important.  You will be able to have a good talk with your boss by considering several things.

First, allow time for your boss to cool down before approaching him or her. This could take a few minutes to a few hours. At this time, try squeezing a stress ball to relax and flex your muscles and relieve body stress. Write down a few   notes on   what you want   to say, so you can approach your boss calmly. Be the first to initiate the conversation and acknowledge your fault. Be ready to accept any disciplinary action from your employer. With the help of your boss, find a solution to the problem and write it down.  Keep notes on vital things you can do.

Try to arrange for a follow-up meeting to look for a long-term solution. Find a solution that works for both parties and one that prevents incidents in the future. Your goal when   talking to an angry boss is to refrain from using unintentional and rash actions and words. If you open a conversation, it is most likely that your boss will take the opportunity to vent about the situation, so you should be prepared for that.