That experience paid dividends, as the sixth-seeded Indians (24-6) held off a massive rally by the Cowboys en route to a 56-52 victory.
Burroughs' win vaults the Indians into Saturday's quarterfinal at home at 7 p.m. versus third-seeded Huntington Beach (26-2), which punched its ticket after a 51-35 triumph at Westminster on Wednesday.
"We're not used to having such a big lead like being up 18 at halftime," Burroughs Coach Vicky Oganyan said. "We're more accustomed to those close league games that we were able to find ways to pull out.
"Maybe that was the best thing we had going is that we've been in so many of these games."
The Indians saw a five-point fourth-quarter advantage trimmed to 53-52 with 2:10 remaining on a three-pointer from Chino senior standout Taylor Brown, who led all players with 26 points.
While Burroughs missed on a three-point attempt on its next possession, the Indians defense also held the Mt. Baldy League-champion Cowboys (23-4) to a long-three point try from Brown that rimmed out.
Burroughs took possession with 1:07 remaining as junior guard Delany Nicol brought the ball upcourt before dishing to senior Paula Galicia, who drove the baseline and kicked to teammate Davina Del Castillo.
The Indians guard caught the pass and buried a 16-footer with 52.3 seconds left to put the visitors ahead, 55-52.
"It was intense," said Del Castillo, who had 10 points and 14 rebounds. "We didn't want an overtime game, but we also wanted to get a good shot. I had the chance and just shot."
Chino attempted to counter Del Castillo's jumper with its inside game and went to sophomore forward Alyssa Gonzalez, who was fouled with 33.9 seconds remaining.
The contest turned against the Cowboys when Gonzalez (six points, 14 rebounds and six blocks) missed both her attempts and the Indians rebounded.
After a timeout from each side and some frantic back-court dribbling by the Indians, Burroughs senior Jakarra Waddell was fouled with 7.2 seconds remaining.