The aforementioned formulae are almost certainly assumed knowledge. It is also conceivable that you could be asked to equate things to derive new formulae, for instance orbital velocity v = sqrt[GM/r].
Just check your syllabus...
They can't test you on something thats not in there.
But don't worry about that.
Come Trial time you will know which formulas are required of you.
its good to know, makes understanding alot easier and covers a few spaces in the syllabus, thus connecting several information (such as transforming and apllying some of the required equations). you also need it in 4U maths