Brighton boss Graham Potter was delighted with their 1-0 win at Norwich City on Saturday.
Belgian winger Trossard settled a scrappy match with a smart finish, sweeping home Aaron Mooy's perfect delivery in what was Brighton's first genuine attack.
Nineteen-year-old substitute Adam Idah was denied an equaliser when he headed against the post in stoppage time.
Potter said afterwards, "The result is the most important thing and we are absolutely delighted, a big three points.
"We have five more games to go and are still fighting for the points. We have to understand we're in a strange situation. Thirty-six points is a decent total but we need more.
"Our response from the lockdown has been really good. Seven points from difficult fixtures, we are delighted with.
"Three points is huge, but we know we still have some work to do. It's not my job to predict what other teams will do.