min and max function in mathcad

Is the below of any help?

Range vectors are useful, but it is generally better to work with vectors.  Your F (which I've renamed vec) is a common user-defined function that converts ranges and matrices into vectors. You'll find it called rng2vec, amongst other things, but the operation of converting matrices into vectors already has the name vec, and it's merely been given an additional Mathcad-specific task.

Stuart

Instead of creating a range j and then converting it to a vector you could create the vector of angles right ahead.
As Stuart I assumed that you meant the angles to be in degree and added that (pseudo) unit.

Note that Prime assumes angles to be in radiant and also displays angles in radiants unless otherwise told by adding the unit 'deg'.

Vectorization when creating the FTMF vector is not mandatory in your case but this depends on the calculations used and so you are always on the safe side if you apply explicit vectorization when you feed a vector into a scalar function.

Prime 10 sheet attached