A finely-poised tie remained goalless until the 72nd minute, when Ghana goalkeeper Razak Brimah failed to deal with a free-kick into his area and John Boye’s weak defensive header merely served as an assist for Ngadeu to control and fire home.
Bassogog then broke away to clinch the win and spark wild celebrations as Hugo Broos’s side progress to a final against Egypt in Libreville on Sunday.
That will be the Indomitable Lions’ first Cup of Nations final since they lost 1-0 to the Egyptians in 2008. Then they also beat Ghana in the semi-finals.
Ghana, who have still never beaten Cameroon at the competition, will now go to Port-Gentil for a third-place play-off against Burkina Faso on Saturday. This was their sixth consecutive Cup of Nations semi-final, but their wait to win the trophy for the first time since 1982 will go on.