Can someone explain the following terms in two lines .the following are then discoveries made by aryabhatta?

if this is all tru (i dont know if it is) you could say: Aryabhatta made significant advances to our knolege of geometry and mathematics in general. Most notably he developed trigonometry.... (u cant discover zero, in the same way u cant discover gravity, u can define it and develop how it is used on maths however.