sin(30) =>
cos(45) =>
tan(45) =>
arcsin(0.7) =>
arccos(0.7) =>
arctan(0.7) =>
;;; switch to radians
true -> popradians;

sin(pi*30/180) =>
cos(pi*45/180) =>
tan(pi*45/180) =>
arcsin(0.7) =>
arccos(0.7) =>
arctan(0.7) =>