For basic blasts and kicking orbs sure, but not telekinesis. That can be cast from anywhere within its range and via thought, which makes predicting it specifically that much harder.
My time is being taken up with other stuff, so I don't really feel like looking up the chapter for confirmation. Exactly what happened here?
She will use it as soon as she realizes that blasting and orbs will not work. Because unless she has something wrong with her brain as well as her horn, she won't keep doing the same tried and failed tactics over and over.
I think I need to clarify something. She's been in two fights the whole series. Both of those fights were over very, very quickly and in her favor. A borderline stomp for her. She was not being blitzed a great deal, or at all. She was not dealing with an opponent that would dodge her every move. One was against the princesses who practically sat and let her hit them. And the other was a fodder anthropomorphic-ish fish that also ended in seconds.
You say "never used it", but then, why would she? The princesses gave her absolutely no cause or reason for it. And the fish? Same deal. Both fights were over in very short order. You really can't say "She never used it, therefore she won't use it until later" when the only two fights she's been in never called for it.
She's going to learn very quickly with Vegeta that simple blasting and bomb kicking won't get her anywhere unless she tries something else, and she only has two "something else's". She'd have to be a literal moron not to. She'll use it when Vegeta starts pressuring her or causes her to waste her equipment and thus options. Both of which, I do not see happening slowly.