Plotting an integral

[Wes Loewer]

(10-12-2019 07:00 PM)lrdheat Wrote:  How do I graph: integral of sin((pi * X^2)/2) from 0 to X on the Prime? It is straight forward on the CASIO fx-CG50...

You are using X for two different things in the same expression. Since you are using X in the limit, you need to use a different variable of integration. Such as

integral of sin((pi * T^2)/2) dT from 0 to X
ie,
∫(SIN((π*T^2/2)),T,0,X)

Even if your calculator allows it, using the same variable for two different meanings like this is considered improper in math. When a student writes something like this, I might not take off points, but I'd write something snarky like "I think you misspelled 't' :-)"