Cohen made three 3s and scored 11 points during a 13-2 run to open the game. Marquette never trailed and led by as many as 24 in the first half.
San Jose State (4-5) scored 19 of the final 24 first-half points to cut its deficit to 40-31 at halftime.
A 3-point play by Cody Schwartz pulled the Spartans within six about 30 seconds into the second half, but they got no closer.
Wilson and Traci Carter both hit 3-pointers during a 12-2 run that put the Golden Eagles up 70-53 with 4:18 to play.
Princeton Onwas led San Jose State with 15 points.