What subjects must be studied in secondary education to become a pilot?

 For becoming a pilot in India, math and physics would be the most important, but you don’t need much of them. The 10th grade level of both should be more than enough.

Aviation courses are good for women?

If a girl wants to do one, then she's free to have one. There are a lot of women goes for aviation courses and they don't seem disappointed at all by this lack of femineity in the aviation field. So aviation is both for men and women.