[forgotpwd16]

Huh? Seems this quote confuses correspondence and equivalence. A frequency f = 1 Hz = 1 s^-1 (aka cycle/s != rad/s) corresponds to an angular frequency ω = 2π rad/s (ω = 2π f) but they're distinct concepts and quantities. The Hz was introduced in SI with all those considered. Basically both statements "1 Hz = 1 rad/s" and "1 Hz = 2π rad/s" are wrong. The only dumb is this quote tbh.

[bradrn]

The point being made in that file is really that, if you take the SI definitions literally, 'cycles' and 'radians' end up both being dimensionless and equal to 1, which is stupid.