Basic mathematics for IGIDR as well as calculus (and 11th and 12th topics such as AP,GP , permutations and combinations) are enough for the preparation or is it essential to do topics such as vectors, trigonometry and 3D geometry?
Will appreciate if someone can help, kind of panicking about that!
Also, what about International economics? Heckscher Ohlin Model, Ricardian model of comparative advantage, trade barriers are enough?