I'm not sure if this is the right forum for this, so please let me know if I should post this somewhere else. I am using the arccosine function in a calculation. The operand I am giving the function ...

There you are in your introductory physics course. The course requirements say that you have to be in Calculus 101 (it's probably not called that) in order to enroll in Physics 101. Why? There are two ...