The Gunners and Bayern are locked at 2-2 ahead of the Champions League quarterfinal second-leg.
Trossard said: "I think we are all ready, we can react after the defeat in the Premier League, it's a great opportunity for us, everyone wants to show what we're capable of and there's no better way to do it tomorrow than to win.
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"I don't think we need anyone to motivate us. Our group has enough experience to deal with these types of situations. We are still united. There are six games left and we want to win them all."
Asked about practicing penalties, he added: "We do this throughout the season. In every match we play in training we always use penalties too. This has helped us throughout the season. If the manager wants me to take one, I showed in the Community Shield that I will always be ready to pull one."