What did the Portuguese learn from Bartolomeu Dias’s accomplishment of sailing around the southern tip of Africa?

The Portuguese learned from the Portuguese explorer who was called Bartolomeu Dias. He was the first European mariner to tour the southern tip of Africa.

This paved the way for a sea route from Europe to Asia and subsequent breakthrough in trade alliances.He opened the door to increased trade with India and other Asian powers.

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.