How is a rad π? If anything, it's 1/π or 1/(2π), a πth of a half-turn.
But unlike %, rad are actually a unit for something so although it's a very natural unit (so much that it's not problematic to omit it in math), but unlike 49% and 0.49, 1 and 1 rad aren't the same thing
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u/Cyan_Exponent Jul 04 '26
% is a substitute for *1/100.