How does the convergency of any two meridians on the Earth change with varying latitude?

Question

ATPL - Airline Transport Pilot license - General Navigation - How does the convergency of any two meridians on the Earth change with varying latitude?

QuizVDS · Accepted Answer

It changes as sine of latitude

QuizVDS · Answer

It changes as cosine of latitude

QuizVDS · Answer

It is of constant value and does not change with latitude

QuizVDS · Answer

It increases with decrease of latitude

ATPL: How does the convergency of any two meridians on the Earth change with varying latitude?

Domanda 252, General Navigation - ATPL - Airline Transport Pilot license