Pedantically, the SI standard[1] defines the term "radian" as a "special name[] for the number one that may be used to convey information about the quantity con

Pedantically, the SI standard[1] defines the term "radian" as a "special name[] for the number one that may be used to convey information about the quantity concerned." [1] https://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf https://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf